Home / 128,023.23-176,671.92-71,434.61

Finding the Fourth Proportional to 128,023.23, 176,671.92 and 71,434.61

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Solution

The fourth proportional to 128,023.23, 176,671.92 and 71,434.61 is: 98,579.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,023.23 : 176,671.92 = 71,434.61 : x
  2. Step 2: Convert to fraction form
    128,023.23/176,671.92 = 71,434.61/x
  3. Step 3: Cross multiply
    128,023.23x = 176,671.92 × 71,434.61
  4. Step 4: Simplify right side
    128,023.23x = 12,620,488,819.79
  5. Step 5: Solve for x
    x = 12,620,488,819.79/128,023.23
  6. Step 6: Final answer
    x = 98,579.68

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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.