Home / 129,341.76-178,418.64-77,645.52

Finding the Fourth Proportional to 129,341.76, 178,418.64 and 77,645.52

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Solution

The fourth proportional to 129,341.76, 178,418.64 and 77,645.52 is: 107,107.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,341.76 : 178,418.64 = 77,645.52 : x
  2. Step 2: Convert to fraction form
    129,341.76/178,418.64 = 77,645.52/x
  3. Step 3: Cross multiply
    129,341.76x = 178,418.64 × 77,645.52
  4. Step 4: Simplify right side
    129,341.76x = 13,853,408,080.49
  5. Step 5: Solve for x
    x = 13,853,408,080.49/129,341.76
  6. Step 6: Final answer
    x = 107,107.00

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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.