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Finding the Fourth Proportional to 243,663.20, 365,494.80 and 85,907.60

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Solution

The fourth proportional to 243,663.20, 365,494.80 and 85,907.60 is: 128,861.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,663.20 : 365,494.80 = 85,907.60 : x
  2. Step 2: Convert to fraction form
    243,663.20/365,494.80 = 85,907.60/x
  3. Step 3: Cross multiply
    243,663.20x = 365,494.80 × 85,907.60
  4. Step 4: Simplify right side
    243,663.20x = 31,398,781,080.48
  5. Step 5: Solve for x
    x = 31,398,781,080.48/243,663.20
  6. Step 6: Final answer
    x = 128,861.40

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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.