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Finding the Fourth Proportional to 71,422.61, 98,564.31 and 39,156.84

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Solution

The fourth proportional to 71,422.61, 98,564.31 and 39,156.84 is: 54,037.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,422.61 : 98,564.31 = 39,156.84 : x
  2. Step 2: Convert to fraction form
    71,422.61/98,564.31 = 39,156.84/x
  3. Step 3: Cross multiply
    71,422.61x = 98,564.31 × 39,156.84
  4. Step 4: Simplify right side
    71,422.61x = 3,859,466,916.38
  5. Step 5: Solve for x
    x = 3,859,466,916.38/71,422.61
  6. Step 6: Final answer
    x = 54,037.05

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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.