Home / 354,671.10-531,849.15-129,972.78

Finding the Fourth Proportional to 354,671.10, 531,849.15 and 129,972.78

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Solution

The fourth proportional to 354,671.10, 531,849.15 and 129,972.78 is: 194,901.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,671.10 : 531,849.15 = 129,972.78 : x
  2. Step 2: Convert to fraction form
    354,671.10/531,849.15 = 129,972.78/x
  3. Step 3: Cross multiply
    354,671.10x = 531,849.15 × 129,972.78
  4. Step 4: Simplify right side
    354,671.10x = 69,125,912,566.14
  5. Step 5: Solve for x
    x = 69,125,912,566.14/354,671.10
  6. Step 6: Final answer
    x = 194,901.45

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1.5x scale

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.