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Finding the Fourth Proportional to 109,418, 150,959.14 and 66,411.04

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Solution

The fourth proportional to 109,418, 150,959.14 and 66,411.04 is: 91,624.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,418 : 150,959.14 = 66,411.04 : x
  2. Step 2: Convert to fraction form
    109,418/150,959.14 = 66,411.04/x
  3. Step 3: Cross multiply
    109,418x = 150,959.14 × 66,411.04
  4. Step 4: Simplify right side
    109,418x = 10,025,353,484.91
  5. Step 5: Solve for x
    x = 10,025,353,484.91/109,418
  6. Step 6: Final answer
    x = 91,624.35

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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.