Home / 129,434.95-178,551.72-89,078.65

Finding the Fourth Proportional to 129,434.95, 178,551.72 and 89,078.65

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Solution

The fourth proportional to 129,434.95, 178,551.72 and 89,078.65 is: 122,881.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,434.95 : 178,551.72 = 89,078.65 : x
  2. Step 2: Convert to fraction form
    129,434.95/178,551.72 = 89,078.65/x
  3. Step 3: Cross multiply
    129,434.95x = 178,551.72 × 89,078.65
  4. Step 4: Simplify right side
    129,434.95x = 15,905,145,443.86
  5. Step 5: Solve for x
    x = 15,905,145,443.86/129,434.95
  6. Step 6: Final answer
    x = 122,881.38

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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.