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Finding the Fourth Proportional to 52,489,809.60, 78,734,714.40 and 42,915,998.40

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Solution

The fourth proportional to 52,489,809.60, 78,734,714.40 and 42,915,998.40 is: 64,373,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,489,809.60 : 78,734,714.40 = 42,915,998.40 : x
  2. Step 2: Convert to fraction form
    52,489,809.60/78,734,714.40 = 42,915,998.40/x
  3. Step 3: Cross multiply
    52,489,809.60x = 78,734,714.40 × 42,915,998.40
  4. Step 4: Simplify right side
    52,489,809.60x = 3,378,978,877,214,857
  5. Step 5: Solve for x
    x = 3,378,978,877,214,857/52,489,809.60
  6. Step 6: Final answer
    x = 64,373,997.60

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.