Home / 91,631.05-137,468.09-28,447.91

Finding the Fourth Proportional to 91,631.05, 137,468.09 and 28,447.91

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Solution

The fourth proportional to 91,631.05, 137,468.09 and 28,447.91 is: 42,678.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,631.05 : 137,468.09 = 28,447.91 : x
  2. Step 2: Convert to fraction form
    91,631.05/137,468.09 = 28,447.91/x
  3. Step 3: Cross multiply
    91,631.05x = 137,468.09 × 28,447.91
  4. Step 4: Simplify right side
    91,631.05x = 3,910,679,591.46
  5. Step 5: Solve for x
    x = 3,910,679,591.46/91,631.05
  6. Step 6: Final answer
    x = 42,678.54

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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.