Home / 129,632.70-178,893.83-72,275.63

Finding the Fourth Proportional to 129,632.70, 178,893.83 and 72,275.63

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Solution

The fourth proportional to 129,632.70, 178,893.83 and 72,275.63 is: 99,740.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,632.70 : 178,893.83 = 72,275.63 : x
  2. Step 2: Convert to fraction form
    129,632.70/178,893.83 = 72,275.63/x
  3. Step 3: Cross multiply
    129,632.70x = 178,893.83 × 72,275.63
  4. Step 4: Simplify right side
    129,632.70x = 12,929,663,552.58
  5. Step 5: Solve for x
    x = 12,929,663,552.58/129,632.70
  6. Step 6: Final answer
    x = 99,740.75

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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.