Home / 129,068.90-178,117.35-71,713.48

Finding the Fourth Proportional to 129,068.90, 178,117.35 and 71,713.48

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Solution

The fourth proportional to 129,068.90, 178,117.35 and 71,713.48 is: 98,965.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,068.90 : 178,117.35 = 71,713.48 : x
  2. Step 2: Convert to fraction form
    129,068.90/178,117.35 = 71,713.48/x
  3. Step 3: Cross multiply
    129,068.90x = 178,117.35 × 71,713.48
  4. Step 4: Simplify right side
    129,068.90x = 12,773,415,016.88
  5. Step 5: Solve for x
    x = 12,773,415,016.88/129,068.90
  6. Step 6: Final answer
    x = 98,965.86

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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.