Home / 103,972.20-155,206.20-91,360.90

Finding the Fourth Proportional to 103,972.20, 155,206.20 and 91,360.90

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Solution

The fourth proportional to 103,972.20, 155,206.20 and 91,360.90 is: 136,380.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,972.20 : 155,206.20 = 91,360.90 : x
  2. Step 2: Convert to fraction form
    103,972.20/155,206.20 = 91,360.90/x
  3. Step 3: Cross multiply
    103,972.20x = 155,206.20 × 91,360.90
  4. Step 4: Simplify right side
    103,972.20x = 14,179,778,117.58
  5. Step 5: Solve for x
    x = 14,179,778,117.58/103,972.20
  6. Step 6: Final answer
    x = 136,380.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.