Home / 129,581.13-178,812.86-71,435.28

Finding the Fourth Proportional to 129,581.13, 178,812.86 and 71,435.28

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Solution

The fourth proportional to 129,581.13, 178,812.86 and 71,435.28 is: 98,575.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,581.13 : 178,812.86 = 71,435.28 : x
  2. Step 2: Convert to fraction form
    129,581.13/178,812.86 = 71,435.28/x
  3. Step 3: Cross multiply
    129,581.13x = 178,812.86 × 71,435.28
  4. Step 4: Simplify right side
    129,581.13x = 12,773,546,364.52
  5. Step 5: Solve for x
    x = 12,773,546,364.52/129,581.13
  6. Step 6: Final answer
    x = 98,575.67

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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.