Home / 129,077.90-178,125.26-71,717.75

Finding the Fourth Proportional to 129,077.90, 178,125.26 and 71,717.75

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Solution

The fourth proportional to 129,077.90, 178,125.26 and 71,717.75 is: 98,969.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,077.90 : 178,125.26 = 71,717.75 : x
  2. Step 2: Convert to fraction form
    129,077.90/178,125.26 = 71,717.75/x
  3. Step 3: Cross multiply
    129,077.90x = 178,125.26 × 71,717.75
  4. Step 4: Simplify right side
    129,077.90x = 12,774,742,284.12
  5. Step 5: Solve for x
    x = 12,774,742,284.12/129,077.90
  6. Step 6: Final answer
    x = 98,969.25

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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.