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Finding the Fourth Proportional to 71,185.61, 98,238.11 and 39,356.55

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Solution

The fourth proportional to 71,185.61, 98,238.11 and 39,356.55 is: 54,313.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,185.61 : 98,238.11 = 39,356.55 : x
  2. Step 2: Convert to fraction form
    71,185.61/98,238.11 = 39,356.55/x
  3. Step 3: Cross multiply
    71,185.61x = 98,238.11 × 39,356.55
  4. Step 4: Simplify right side
    71,185.61x = 3,866,312,891.34
  5. Step 5: Solve for x
    x = 3,866,312,891.34/71,185.61
  6. Step 6: Final answer
    x = 54,313.13

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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.