Home / 129,430.19-178,668.77-87,013.32

Finding the Fourth Proportional to 129,430.19, 178,668.77 and 87,013.32

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Solution

The fourth proportional to 129,430.19, 178,668.77 and 87,013.32 is: 120,115.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,430.19 : 178,668.77 = 87,013.32 : x
  2. Step 2: Convert to fraction form
    129,430.19/178,668.77 = 87,013.32/x
  3. Step 3: Cross multiply
    129,430.19x = 178,668.77 × 87,013.32
  4. Step 4: Simplify right side
    129,430.19x = 15,546,562,757.95
  5. Step 5: Solve for x
    x = 15,546,562,757.95/129,430.19
  6. Step 6: Final answer
    x = 120,115.43

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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.