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Finding the Fourth Proportional to 387,915.34, 581,873.68 and 121,696.82

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Solution

The fourth proportional to 387,915.34, 581,873.68 and 121,696.82 is: 182,545.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,915.34 : 581,873.68 = 121,696.82 : x
  2. Step 2: Convert to fraction form
    387,915.34/581,873.68 = 121,696.82/x
  3. Step 3: Cross multiply
    387,915.34x = 581,873.68 × 121,696.82
  4. Step 4: Simplify right side
    387,915.34x = 70,812,176,497.70
  5. Step 5: Solve for x
    x = 70,812,176,497.70/387,915.34
  6. Step 6: Final answer
    x = 182,545.44

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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.