Home / 447,985.62-672,061.25-128,123.91

Finding the Fourth Proportional to 447,985.62, 672,061.25 and 128,123.91

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Solution

The fourth proportional to 447,985.62, 672,061.25 and 128,123.91 is: 192,209.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,985.62 : 672,061.25 = 128,123.91 : x
  2. Step 2: Convert to fraction form
    447,985.62/672,061.25 = 128,123.91/x
  3. Step 3: Cross multiply
    447,985.62x = 672,061.25 × 128,123.91
  4. Step 4: Simplify right side
    447,985.62x = 86,107,115,429.80
  5. Step 5: Solve for x
    x = 86,107,115,429.80/447,985.62
  6. Step 6: Final answer
    x = 192,209.55

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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.