Home / 129,366.86-178,525.98-72,778.23

Finding the Fourth Proportional to 129,366.86, 178,525.98 and 72,778.23

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Solution

The fourth proportional to 129,366.86, 178,525.98 and 72,778.23 is: 100,433.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,366.86 : 178,525.98 = 72,778.23 : x
  2. Step 2: Convert to fraction form
    129,366.86/178,525.98 = 72,778.23/x
  3. Step 3: Cross multiply
    129,366.86x = 178,525.98 × 72,778.23
  4. Step 4: Simplify right side
    129,366.86x = 12,992,804,833.42
  5. Step 5: Solve for x
    x = 12,992,804,833.42/129,366.86
  6. Step 6: Final answer
    x = 100,433.80

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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.