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Finding the Fourth Proportional to 158,800.68, 219,143.25 and 87,178.86

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Solution

The fourth proportional to 158,800.68, 219,143.25 and 87,178.86 is: 120,305.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,800.68 : 219,143.25 = 87,178.86 : x
  2. Step 2: Convert to fraction form
    158,800.68/219,143.25 = 87,178.86/x
  3. Step 3: Cross multiply
    158,800.68x = 219,143.25 × 87,178.86
  4. Step 4: Simplify right side
    158,800.68x = 19,104,658,711.70
  5. Step 5: Solve for x
    x = 19,104,658,711.70/158,800.68
  6. Step 6: Final answer
    x = 120,305.90

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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.