Home / 129,221.37-178,341.50-72,632.75

Finding the Fourth Proportional to 129,221.37, 178,341.50 and 72,632.75

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Solution

The fourth proportional to 129,221.37, 178,341.50 and 72,632.75 is: 100,242.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,221.37 : 178,341.50 = 72,632.75 : x
  2. Step 2: Convert to fraction form
    129,221.37/178,341.50 = 72,632.75/x
  3. Step 3: Cross multiply
    129,221.37x = 178,341.50 × 72,632.75
  4. Step 4: Simplify right side
    129,221.37x = 12,953,432,874.00
  5. Step 5: Solve for x
    x = 12,953,432,874.00/129,221.37
  6. Step 6: Final answer
    x = 100,242.19

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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.