Home / 85,826.20-128,480.10-75,458.20

Finding the Fourth Proportional to 85,826.20, 128,480.10 and 75,458.20

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Solution

The fourth proportional to 85,826.20, 128,480.10 and 75,458.20 is: 112,959.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,826.20 : 128,480.10 = 75,458.20 : x
  2. Step 2: Convert to fraction form
    85,826.20/128,480.10 = 75,458.20/x
  3. Step 3: Cross multiply
    85,826.20x = 128,480.10 × 75,458.20
  4. Step 4: Simplify right side
    85,826.20x = 9,694,877,081.82
  5. Step 5: Solve for x
    x = 9,694,877,081.82/85,826.20
  6. Step 6: Final answer
    x = 112,959.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.