Home / 129,207.75-178,292.42-77,522.10

Finding the Fourth Proportional to 129,207.75, 178,292.42 and 77,522.10

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Solution

The fourth proportional to 129,207.75, 178,292.42 and 77,522.10 is: 106,971.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,207.75 : 178,292.42 = 77,522.10 : x
  2. Step 2: Convert to fraction form
    129,207.75/178,292.42 = 77,522.10/x
  3. Step 3: Cross multiply
    129,207.75x = 178,292.42 × 77,522.10
  4. Step 4: Simplify right side
    129,207.75x = 13,821,602,046.98
  5. Step 5: Solve for x
    x = 13,821,602,046.98/129,207.75
  6. Step 6: Final answer
    x = 106,971.93

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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.