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Finding the Fourth Proportional to 92,690.70, 139,036.05 and 89,061.90

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Solution

The fourth proportional to 92,690.70, 139,036.05 and 89,061.90 is: 133,592.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,690.70 : 139,036.05 = 89,061.90 : x
  2. Step 2: Convert to fraction form
    92,690.70/139,036.05 = 89,061.90/x
  3. Step 3: Cross multiply
    92,690.70x = 139,036.05 × 89,061.90
  4. Step 4: Simplify right side
    92,690.70x = 12,382,814,781.50
  5. Step 5: Solve for x
    x = 12,382,814,781.50/92,690.70
  6. Step 6: Final answer
    x = 133,592.85

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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.