Home / 99,315.20-148,900.80-40,121.60

Finding the Fourth Proportional to 99,315.20, 148,900.80 and 40,121.60

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Solution

The fourth proportional to 99,315.20, 148,900.80 and 40,121.60 is: 60,153.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,315.20 : 148,900.80 = 40,121.60 : x
  2. Step 2: Convert to fraction form
    99,315.20/148,900.80 = 40,121.60/x
  3. Step 3: Cross multiply
    99,315.20x = 148,900.80 × 40,121.60
  4. Step 4: Simplify right side
    99,315.20x = 5,974,138,337.28
  5. Step 5: Solve for x
    x = 5,974,138,337.28/99,315.20
  6. Step 6: Final answer
    x = 60,153.31

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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.