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Finding the Fourth Proportional to 61,866.90, 92,801.79 and 15,120.18

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Solution

The fourth proportional to 61,866.90, 92,801.79 and 15,120.18 is: 22,680.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,866.90 : 92,801.79 = 15,120.18 : x
  2. Step 2: Convert to fraction form
    61,866.90/92,801.79 = 15,120.18/x
  3. Step 3: Cross multiply
    61,866.90x = 92,801.79 × 15,120.18
  4. Step 4: Simplify right side
    61,866.90x = 1,403,179,769.12
  5. Step 5: Solve for x
    x = 1,403,179,769.12/61,866.90
  6. Step 6: Final answer
    x = 22,680.62

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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.