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Finding the Fourth Proportional to 92,531.68, 139,373.88 and 86,043.04

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Solution

The fourth proportional to 92,531.68, 139,373.88 and 86,043.04 is: 129,600.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,531.68 : 139,373.88 = 86,043.04 : x
  2. Step 2: Convert to fraction form
    92,531.68/139,373.88 = 86,043.04/x
  3. Step 3: Cross multiply
    92,531.68x = 139,373.88 × 86,043.04
  4. Step 4: Simplify right side
    92,531.68x = 11,992,152,331.80
  5. Step 5: Solve for x
    x = 11,992,152,331.80/92,531.68
  6. Step 6: Final answer
    x = 129,600.50

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.