Home / 128,621.62-177,500.28-72,032.86

Finding the Fourth Proportional to 128,621.62, 177,500.28 and 72,032.86

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Solution

The fourth proportional to 128,621.62, 177,500.28 and 72,032.86 is: 99,406.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,621.62 : 177,500.28 = 72,032.86 : x
  2. Step 2: Convert to fraction form
    128,621.62/177,500.28 = 72,032.86/x
  3. Step 3: Cross multiply
    128,621.62x = 177,500.28 × 72,032.86
  4. Step 4: Simplify right side
    128,621.62x = 12,785,852,819.20
  5. Step 5: Solve for x
    x = 12,785,852,819.20/128,621.62
  6. Step 6: Final answer
    x = 99,406.72

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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.