Home / 90,828.80-136,243.20-68,710.40

Finding the Fourth Proportional to 90,828.80, 136,243.20 and 68,710.40

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Solution

The fourth proportional to 90,828.80, 136,243.20 and 68,710.40 is: 103,065.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,828.80 : 136,243.20 = 68,710.40 : x
  2. Step 2: Convert to fraction form
    90,828.80/136,243.20 = 68,710.40/x
  3. Step 3: Cross multiply
    90,828.80x = 136,243.20 × 68,710.40
  4. Step 4: Simplify right side
    90,828.80x = 9,361,324,769.28
  5. Step 5: Solve for x
    x = 9,361,324,769.28/90,828.80
  6. Step 6: Final answer
    x = 103,065.60

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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.