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Finding the Fourth Proportional to 154,866.72, 232,398.40 and 66,120.90

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Solution

The fourth proportional to 154,866.72, 232,398.40 and 66,120.90 is: 99,223.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,866.72 : 232,398.40 = 66,120.90 : x
  2. Step 2: Convert to fraction form
    154,866.72/232,398.40 = 66,120.90/x
  3. Step 3: Cross multiply
    154,866.72x = 232,398.40 × 66,120.90
  4. Step 4: Simplify right side
    154,866.72x = 15,366,391,366.56
  5. Step 5: Solve for x
    x = 15,366,391,366.56/154,866.72
  6. Step 6: Final answer
    x = 99,223.33

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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.