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Finding the Fourth Proportional to 123,779.92, 170,816.13 and 67,191.28

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Solution

The fourth proportional to 123,779.92, 170,816.13 and 67,191.28 is: 92,723.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,779.92 : 170,816.13 = 67,191.28 : x
  2. Step 2: Convert to fraction form
    123,779.92/170,816.13 = 67,191.28/x
  3. Step 3: Cross multiply
    123,779.92x = 170,816.13 × 67,191.28
  4. Step 4: Simplify right side
    123,779.92x = 11,477,354,419.35
  5. Step 5: Solve for x
    x = 11,477,354,419.35/123,779.92
  6. Step 6: Final answer
    x = 92,723.88

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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.