Home / 129,049.50-178,116.75-71,708.49

Finding the Fourth Proportional to 129,049.50, 178,116.75 and 71,708.49

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Solution

The fourth proportional to 129,049.50, 178,116.75 and 71,708.49 is: 98,973.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,049.50 : 178,116.75 = 71,708.49 : x
  2. Step 2: Convert to fraction form
    129,049.50/178,116.75 = 71,708.49/x
  3. Step 3: Cross multiply
    129,049.50x = 178,116.75 × 71,708.49
  4. Step 4: Simplify right side
    129,049.50x = 12,772,483,186.21
  5. Step 5: Solve for x
    x = 12,772,483,186.21/129,049.50
  6. Step 6: Final answer
    x = 98,973.52

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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.