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Finding the Fourth Proportional to 83,092.40, 124,638.60 and 66,657.20

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Solution

The fourth proportional to 83,092.40, 124,638.60 and 66,657.20 is: 99,985.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,092.40 : 124,638.60 = 66,657.20 : x
  2. Step 2: Convert to fraction form
    83,092.40/124,638.60 = 66,657.20/x
  3. Step 3: Cross multiply
    83,092.40x = 124,638.60 × 66,657.20
  4. Step 4: Simplify right side
    83,092.40x = 8,308,060,087.92
  5. Step 5: Solve for x
    x = 8,308,060,087.92/83,092.40
  6. Step 6: Final answer
    x = 99,985.80

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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.