Home / 129,126.96-178,187.04-75,427.20

Finding the Fourth Proportional to 129,126.96, 178,187.04 and 75,427.20

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Solution

The fourth proportional to 129,126.96, 178,187.04 and 75,427.20 is: 104,084.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,126.96 : 178,187.04 = 75,427.20 : x
  2. Step 2: Convert to fraction form
    129,126.96/178,187.04 = 75,427.20/x
  3. Step 3: Cross multiply
    129,126.96x = 178,187.04 × 75,427.20
  4. Step 4: Simplify right side
    129,126.96x = 13,440,149,503.49
  5. Step 5: Solve for x
    x = 13,440,149,503.49/129,126.96
  6. Step 6: Final answer
    x = 104,084.77

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1.5x scale

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.