Home / 80,931.15-121,389.03-28,337.85

Finding the Fourth Proportional to 80,931.15, 121,389.03 and 28,337.85

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Solution

The fourth proportional to 80,931.15, 121,389.03 and 28,337.85 is: 42,504.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,931.15 : 121,389.03 = 28,337.85 : x
  2. Step 2: Convert to fraction form
    80,931.15/121,389.03 = 28,337.85/x
  3. Step 3: Cross multiply
    80,931.15x = 121,389.03 × 28,337.85
  4. Step 4: Simplify right side
    80,931.15x = 3,439,904,123.79
  5. Step 5: Solve for x
    x = 3,439,904,123.79/80,931.15
  6. Step 6: Final answer
    x = 42,504.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.