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Finding the Fourth Proportional to 158,007.81, 217,920.87 and 112,671.30

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Solution

The fourth proportional to 158,007.81, 217,920.87 and 112,671.30 is: 155,393.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,007.81 : 217,920.87 = 112,671.30 : x
  2. Step 2: Convert to fraction form
    158,007.81/217,920.87 = 112,671.30/x
  3. Step 3: Cross multiply
    158,007.81x = 217,920.87 × 112,671.30
  4. Step 4: Simplify right side
    158,007.81x = 24,553,427,720.03
  5. Step 5: Solve for x
    x = 24,553,427,720.03/158,007.81
  6. Step 6: Final answer
    x = 155,393.76

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1.5x scale

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.