Home / 129,126.64-178,194.63-71,764.15

Finding the Fourth Proportional to 129,126.64, 178,194.63 and 71,764.15

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Solution

The fourth proportional to 129,126.64, 178,194.63 and 71,764.15 is: 99,034.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,126.64 : 178,194.63 = 71,764.15 : x
  2. Step 2: Convert to fraction form
    129,126.64/178,194.63 = 71,764.15/x
  3. Step 3: Cross multiply
    129,126.64x = 178,194.63 × 71,764.15
  4. Step 4: Simplify right side
    129,126.64x = 12,787,986,156.51
  5. Step 5: Solve for x
    x = 12,787,986,156.51/129,126.64
  6. Step 6: Final answer
    x = 99,034.45

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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.