Home / 90,851.20-136,147.20-66,972.40

Finding the Fourth Proportional to 90,851.20, 136,147.20 and 66,972.40

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Solution

The fourth proportional to 90,851.20, 136,147.20 and 66,972.40 is: 100,363.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,851.20 : 136,147.20 = 66,972.40 : x
  2. Step 2: Convert to fraction form
    90,851.20/136,147.20 = 66,972.40/x
  3. Step 3: Cross multiply
    90,851.20x = 136,147.20 × 66,972.40
  4. Step 4: Simplify right side
    90,851.20x = 9,118,104,737.28
  5. Step 5: Solve for x
    x = 9,118,104,737.28/90,851.20
  6. Step 6: Final answer
    x = 100,363.06

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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.