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Finding the Fourth Proportional to 89,951.46, 124,129.80 and 49,664.40

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Solution

The fourth proportional to 89,951.46, 124,129.80 and 49,664.40 is: 68,535.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,951.46 : 124,129.80 = 49,664.40 : x
  2. Step 2: Convert to fraction form
    89,951.46/124,129.80 = 49,664.40/x
  3. Step 3: Cross multiply
    89,951.46x = 124,129.80 × 49,664.40
  4. Step 4: Simplify right side
    89,951.46x = 6,164,832,039.12
  5. Step 5: Solve for x
    x = 6,164,832,039.12/89,951.46
  6. Step 6: Final answer
    x = 68,535.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.