Home / 129,338.27-178,487.99-71,980.01

Finding the Fourth Proportional to 129,338.27, 178,487.99 and 71,980.01

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Solution

The fourth proportional to 129,338.27, 178,487.99 and 71,980.01 is: 99,333.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,338.27 : 178,487.99 = 71,980.01 : x
  2. Step 2: Convert to fraction form
    129,338.27/178,487.99 = 71,980.01/x
  3. Step 3: Cross multiply
    129,338.27x = 178,487.99 × 71,980.01
  4. Step 4: Simplify right side
    129,338.27x = 12,847,566,052.74
  5. Step 5: Solve for x
    x = 12,847,566,052.74/129,338.27
  6. Step 6: Final answer
    x = 99,333.06

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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.