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Finding the Fourth Proportional to 123,779.91, 170,816.13 and 67,191.29

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Solution

The fourth proportional to 123,779.91, 170,816.13 and 67,191.29 is: 92,723.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,779.91 : 170,816.13 = 67,191.29 : x
  2. Step 2: Convert to fraction form
    123,779.91/170,816.13 = 67,191.29/x
  3. Step 3: Cross multiply
    123,779.91x = 170,816.13 × 67,191.29
  4. Step 4: Simplify right side
    123,779.91x = 11,477,356,127.51
  5. Step 5: Solve for x
    x = 11,477,356,127.51/123,779.91
  6. Step 6: Final answer
    x = 92,723.90

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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.