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Finding the Fourth Proportional to 351,920.30, 527,881.46 and 85,680.59

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Solution

The fourth proportional to 351,920.30, 527,881.46 and 85,680.59 is: 128,521.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,920.30 : 527,881.46 = 85,680.59 : x
  2. Step 2: Convert to fraction form
    351,920.30/527,881.46 = 85,680.59/x
  3. Step 3: Cross multiply
    351,920.30x = 527,881.46 × 85,680.59
  4. Step 4: Simplify right side
    351,920.30x = 45,229,191,875.05
  5. Step 5: Solve for x
    x = 45,229,191,875.05/351,920.30
  6. Step 6: Final answer
    x = 128,521.12

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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.