Home / 129,364.66-178,521.87-72,003.12

Finding the Fourth Proportional to 129,364.66, 178,521.87 and 72,003.12

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Solution

The fourth proportional to 129,364.66, 178,521.87 and 72,003.12 is: 99,363.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,364.66 : 178,521.87 = 72,003.12 : x
  2. Step 2: Convert to fraction form
    129,364.66/178,521.87 = 72,003.12/x
  3. Step 3: Cross multiply
    129,364.66x = 178,521.87 × 72,003.12
  4. Step 4: Simplify right side
    129,364.66x = 12,854,131,628.23
  5. Step 5: Solve for x
    x = 12,854,131,628.23/129,364.66
  6. Step 6: Final answer
    x = 99,363.55

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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.