Home / 99,428.28-137,208.24-54,105.20

Finding the Fourth Proportional to 99,428.28, 137,208.24 and 54,105.20

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Solution

The fourth proportional to 99,428.28, 137,208.24 and 54,105.20 is: 74,663.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,428.28 : 137,208.24 = 54,105.20 : x
  2. Step 2: Convert to fraction form
    99,428.28/137,208.24 = 54,105.20/x
  3. Step 3: Cross multiply
    99,428.28x = 137,208.24 × 54,105.20
  4. Step 4: Simplify right side
    99,428.28x = 7,423,679,266.85
  5. Step 5: Solve for x
    x = 7,423,679,266.85/99,428.28
  6. Step 6: Final answer
    x = 74,663.66

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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.