Home / 90,868.20-136,010.70-71,039.40

Finding the Fourth Proportional to 90,868.20, 136,010.70 and 71,039.40

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Solution

The fourth proportional to 90,868.20, 136,010.70 and 71,039.40 is: 106,331.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,868.20 : 136,010.70 = 71,039.40 : x
  2. Step 2: Convert to fraction form
    90,868.20/136,010.70 = 71,039.40/x
  3. Step 3: Cross multiply
    90,868.20x = 136,010.70 × 71,039.40
  4. Step 4: Simplify right side
    90,868.20x = 9,662,118,521.58
  5. Step 5: Solve for x
    x = 9,662,118,521.58/90,868.20
  6. Step 6: Final answer
    x = 106,331.13

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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.