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Finding the Fourth Proportional to 92,708.40, 139,062.60 and 92,125.20

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Solution

The fourth proportional to 92,708.40, 139,062.60 and 92,125.20 is: 138,187.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,708.40 : 139,062.60 = 92,125.20 : x
  2. Step 2: Convert to fraction form
    92,708.40/139,062.60 = 92,125.20/x
  3. Step 3: Cross multiply
    92,708.40x = 139,062.60 × 92,125.20
  4. Step 4: Simplify right side
    92,708.40x = 12,811,169,837.52
  5. Step 5: Solve for x
    x = 12,811,169,837.52/92,708.40
  6. Step 6: Final answer
    x = 138,187.80

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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.