Home / 129,132.48-178,199.22-71,770.34

Finding the Fourth Proportional to 129,132.48, 178,199.22 and 71,770.34

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Solution

The fourth proportional to 129,132.48, 178,199.22 and 71,770.34 is: 99,041.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,132.48 : 178,199.22 = 71,770.34 : x
  2. Step 2: Convert to fraction form
    129,132.48/178,199.22 = 71,770.34/x
  3. Step 3: Cross multiply
    129,132.48x = 178,199.22 × 71,770.34
  4. Step 4: Simplify right side
    129,132.48x = 12,789,418,607.13
  5. Step 5: Solve for x
    x = 12,789,418,607.13/129,132.48
  6. Step 6: Final answer
    x = 99,041.07

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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.