Home / 129,341.70-178,478.91-72,751.86

Finding the Fourth Proportional to 129,341.70, 178,478.91 and 72,751.86

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Solution

The fourth proportional to 129,341.70, 178,478.91 and 72,751.86 is: 100,390.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,341.70 : 178,478.91 = 72,751.86 : x
  2. Step 2: Convert to fraction form
    129,341.70/178,478.91 = 72,751.86/x
  3. Step 3: Cross multiply
    129,341.70x = 178,478.91 × 72,751.86
  4. Step 4: Simplify right side
    129,341.70x = 12,984,672,673.27
  5. Step 5: Solve for x
    x = 12,984,672,673.27/129,341.70
  6. Step 6: Final answer
    x = 100,390.46

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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.