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Finding the Fourth Proportional to 92,612.22, 139,102.95 and 87,389.94

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Solution

The fourth proportional to 92,612.22, 139,102.95 and 87,389.94 is: 131,259.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,612.22 : 139,102.95 = 87,389.94 : x
  2. Step 2: Convert to fraction form
    92,612.22/139,102.95 = 87,389.94/x
  3. Step 3: Cross multiply
    92,612.22x = 139,102.95 × 87,389.94
  4. Step 4: Simplify right side
    92,612.22x = 12,156,198,454.32
  5. Step 5: Solve for x
    x = 12,156,198,454.32/92,612.22
  6. Step 6: Final answer
    x = 131,259.12

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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.