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Finding the Fourth Proportional to 92,511.40, 138,831.90 and 59,312.20

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Solution

The fourth proportional to 92,511.40, 138,831.90 and 59,312.20 is: 89,009.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,511.40 : 138,831.90 = 59,312.20 : x
  2. Step 2: Convert to fraction form
    92,511.40/138,831.90 = 59,312.20/x
  3. Step 3: Cross multiply
    92,511.40x = 138,831.90 × 59,312.20
  4. Step 4: Simplify right side
    92,511.40x = 8,234,425,419.18
  5. Step 5: Solve for x
    x = 8,234,425,419.18/92,511.40
  6. Step 6: Final answer
    x = 89,009.85

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1.5x scale

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.