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Finding the Fourth Proportional to 61,515, 84,866.40 and 38,845.53

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Solution

The fourth proportional to 61,515, 84,866.40 and 38,845.53 is: 53,591.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,515 : 84,866.40 = 38,845.53 : x
  2. Step 2: Convert to fraction form
    61,515/84,866.40 = 38,845.53/x
  3. Step 3: Cross multiply
    61,515x = 84,866.40 × 38,845.53
  4. Step 4: Simplify right side
    61,515x = 3,296,680,287.19
  5. Step 5: Solve for x
    x = 3,296,680,287.19/61,515
  6. Step 6: Final answer
    x = 53,591.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.