Home / 123,586.08-170,458.20-81,129.12

Finding the Fourth Proportional to 123,586.08, 170,458.20 and 81,129.12

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Solution

The fourth proportional to 123,586.08, 170,458.20 and 81,129.12 is: 111,898.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,586.08 : 170,458.20 = 81,129.12 : x
  2. Step 2: Convert to fraction form
    123,586.08/170,458.20 = 81,129.12/x
  3. Step 3: Cross multiply
    123,586.08x = 170,458.20 × 81,129.12
  4. Step 4: Simplify right side
    123,586.08x = 13,829,123,762.78
  5. Step 5: Solve for x
    x = 13,829,123,762.78/123,586.08
  6. Step 6: Final answer
    x = 111,898.72

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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.