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Finding the Fourth Proportional to 71,392.17, 98,521.79 and 39,561.60

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Solution

The fourth proportional to 71,392.17, 98,521.79 and 39,561.60 is: 54,595.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,392.17 : 98,521.79 = 39,561.60 : x
  2. Step 2: Convert to fraction form
    71,392.17/98,521.79 = 39,561.60/x
  3. Step 3: Cross multiply
    71,392.17x = 98,521.79 × 39,561.60
  4. Step 4: Simplify right side
    71,392.17x = 3,897,679,695.76
  5. Step 5: Solve for x
    x = 3,897,679,695.76/71,392.17
  6. Step 6: Final answer
    x = 54,595.34

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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.