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Finding the Fourth Proportional to 156,868.79, 216,480.30 and 85,248.82

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Solution

The fourth proportional to 156,868.79, 216,480.30 and 85,248.82 is: 117,644.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,868.79 : 216,480.30 = 85,248.82 : x
  2. Step 2: Convert to fraction form
    156,868.79/216,480.30 = 85,248.82/x
  3. Step 3: Cross multiply
    156,868.79x = 216,480.30 × 85,248.82
  4. Step 4: Simplify right side
    156,868.79x = 18,454,690,079.16
  5. Step 5: Solve for x
    x = 18,454,690,079.16/156,868.79
  6. Step 6: Final answer
    x = 117,644.12

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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.