Home / 128,815.88-177,776.22-71,460.86

Finding the Fourth Proportional to 128,815.88, 177,776.22 and 71,460.86

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Solution

The fourth proportional to 128,815.88, 177,776.22 and 71,460.86 is: 98,621.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,815.88 : 177,776.22 = 71,460.86 : x
  2. Step 2: Convert to fraction form
    128,815.88/177,776.22 = 71,460.86/x
  3. Step 3: Cross multiply
    128,815.88x = 177,776.22 × 71,460.86
  4. Step 4: Simplify right side
    128,815.88x = 12,704,041,568.75
  5. Step 5: Solve for x
    x = 12,704,041,568.75/128,815.88
  6. Step 6: Final answer
    x = 98,621.70

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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.