Home / 318,123.28-439,018.53-172,938.83

Finding the Fourth Proportional to 318,123.28, 439,018.53 and 172,938.83

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Solution

The fourth proportional to 318,123.28, 439,018.53 and 172,938.83 is: 238,660.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,123.28 : 439,018.53 = 172,938.83 : x
  2. Step 2: Convert to fraction form
    318,123.28/439,018.53 = 172,938.83/x
  3. Step 3: Cross multiply
    318,123.28x = 439,018.53 × 172,938.83
  4. Step 4: Simplify right side
    318,123.28x = 75,923,350,926.52
  5. Step 5: Solve for x
    x = 75,923,350,926.52/318,123.28
  6. Step 6: Final answer
    x = 238,660.15

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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.