Home / 129,639.50-178,918.35-73,061.18

Finding the Fourth Proportional to 129,639.50, 178,918.35 and 73,061.18

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Solution

The fourth proportional to 129,639.50, 178,918.35 and 73,061.18 is: 100,833.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,639.50 : 178,918.35 = 73,061.18 : x
  2. Step 2: Convert to fraction form
    129,639.50/178,918.35 = 73,061.18/x
  3. Step 3: Cross multiply
    129,639.50x = 178,918.35 × 73,061.18
  4. Step 4: Simplify right side
    129,639.50x = 13,071,985,774.65
  5. Step 5: Solve for x
    x = 13,071,985,774.65/129,639.50
  6. Step 6: Final answer
    x = 100,833.36

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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.