Home / 85,715.24-128,572.84-38,981.48

Finding the Fourth Proportional to 85,715.24, 128,572.84 and 38,981.48

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Solution

The fourth proportional to 85,715.24, 128,572.84 and 38,981.48 is: 58,472.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,715.24 : 128,572.84 = 38,981.48 : x
  2. Step 2: Convert to fraction form
    85,715.24/128,572.84 = 38,981.48/x
  3. Step 3: Cross multiply
    85,715.24x = 128,572.84 × 38,981.48
  4. Step 4: Simplify right side
    85,715.24x = 5,011,959,591.00
  5. Step 5: Solve for x
    x = 5,011,959,591.00/85,715.24
  6. Step 6: Final answer
    x = 58,472.21

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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.