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Finding the Fourth Proportional to 77,473.60, 116,064.60 and 39,905.80

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Solution

The fourth proportional to 77,473.60, 116,064.60 and 39,905.80 is: 59,783.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,473.60 : 116,064.60 = 39,905.80 : x
  2. Step 2: Convert to fraction form
    77,473.60/116,064.60 = 39,905.80/x
  3. Step 3: Cross multiply
    77,473.60x = 116,064.60 × 39,905.80
  4. Step 4: Simplify right side
    77,473.60x = 4,631,650,714.68
  5. Step 5: Solve for x
    x = 4,631,650,714.68/77,473.60
  6. Step 6: Final answer
    x = 59,783.60

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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.