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Finding the Fourth Proportional to 148,925.40, 223,388.10 and 85,721.10

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Solution

The fourth proportional to 148,925.40, 223,388.10 and 85,721.10 is: 128,581.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,925.40 : 223,388.10 = 85,721.10 : x
  2. Step 2: Convert to fraction form
    148,925.40/223,388.10 = 85,721.10/x
  3. Step 3: Cross multiply
    148,925.40x = 223,388.10 × 85,721.10
  4. Step 4: Simplify right side
    148,925.40x = 19,149,073,658.91
  5. Step 5: Solve for x
    x = 19,149,073,658.91/148,925.40
  6. Step 6: Final answer
    x = 128,581.65

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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.