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Finding the Fourth Proportional to 156,868.80, 216,477.88 and 85,248.81

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Solution

The fourth proportional to 156,868.80, 216,477.88 and 85,248.81 is: 117,642.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,868.80 : 216,477.88 = 85,248.81 : x
  2. Step 2: Convert to fraction form
    156,868.80/216,477.88 = 85,248.81/x
  3. Step 3: Cross multiply
    156,868.80x = 216,477.88 × 85,248.81
  4. Step 4: Simplify right side
    156,868.80x = 18,454,481,661.32
  5. Step 5: Solve for x
    x = 18,454,481,661.32/156,868.80
  6. Step 6: Final answer
    x = 117,642.78

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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.