Home / 129,627.06-178,918.65-84,417.72

Finding the Fourth Proportional to 129,627.06, 178,918.65 and 84,417.72

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Solution

The fourth proportional to 129,627.06, 178,918.65 and 84,417.72 is: 116,518.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,627.06 : 178,918.65 = 84,417.72 : x
  2. Step 2: Convert to fraction form
    129,627.06/178,918.65 = 84,417.72/x
  3. Step 3: Cross multiply
    129,627.06x = 178,918.65 × 84,417.72
  4. Step 4: Simplify right side
    129,627.06x = 15,103,904,498.48
  5. Step 5: Solve for x
    x = 15,103,904,498.48/129,627.06
  6. Step 6: Final answer
    x = 116,518.14

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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.