Home / 129,020.22-178,041.81-71,663.23

Finding the Fourth Proportional to 129,020.22, 178,041.81 and 71,663.23

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Solution

The fourth proportional to 129,020.22, 178,041.81 and 71,663.23 is: 98,891.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,020.22 : 178,041.81 = 71,663.23 : x
  2. Step 2: Convert to fraction form
    129,020.22/178,041.81 = 71,663.23/x
  3. Step 3: Cross multiply
    129,020.22x = 178,041.81 × 71,663.23
  4. Step 4: Simplify right side
    129,020.22x = 12,759,051,670.94
  5. Step 5: Solve for x
    x = 12,759,051,670.94/129,020.22
  6. Step 6: Final answer
    x = 98,891.88

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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.