Home / 231,147.12-318,989.34-130,545.12

Finding the Fourth Proportional to 231,147.12, 318,989.34 and 130,545.12

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Solution

The fourth proportional to 231,147.12, 318,989.34 and 130,545.12 is: 180,155.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,147.12 : 318,989.34 = 130,545.12 : x
  2. Step 2: Convert to fraction form
    231,147.12/318,989.34 = 130,545.12/x
  3. Step 3: Cross multiply
    231,147.12x = 318,989.34 × 130,545.12
  4. Step 4: Simplify right side
    231,147.12x = 41,642,501,669.02
  5. Step 5: Solve for x
    x = 41,642,501,669.02/231,147.12
  6. Step 6: Final answer
    x = 180,155.83

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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.