Home / 128,320.10-192,478.02-38,363.02

Finding the Fourth Proportional to 128,320.10, 192,478.02 and 38,363.02

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Solution

The fourth proportional to 128,320.10, 192,478.02 and 38,363.02 is: 57,543.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,320.10 : 192,478.02 = 38,363.02 : x
  2. Step 2: Convert to fraction form
    128,320.10/192,478.02 = 38,363.02/x
  3. Step 3: Cross multiply
    128,320.10x = 192,478.02 × 38,363.02
  4. Step 4: Simplify right side
    128,320.10x = 7,384,037,793.49
  5. Step 5: Solve for x
    x = 7,384,037,793.49/128,320.10
  6. Step 6: Final answer
    x = 57,543.89

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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.