Home / 129,082.19-178,135.71-71,726.81

Finding the Fourth Proportional to 129,082.19, 178,135.71 and 71,726.81

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Solution

The fourth proportional to 129,082.19, 178,135.71 and 71,726.81 is: 98,984.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,082.19 : 178,135.71 = 71,726.81 : x
  2. Step 2: Convert to fraction form
    129,082.19/178,135.71 = 71,726.81/x
  3. Step 3: Cross multiply
    129,082.19x = 178,135.71 × 71,726.81
  4. Step 4: Simplify right side
    129,082.19x = 12,777,106,225.39
  5. Step 5: Solve for x
    x = 12,777,106,225.39/129,082.19
  6. Step 6: Final answer
    x = 98,984.27

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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.