Home / 112,921.45-155,820.36-65,190.17

Finding the Fourth Proportional to 112,921.45, 155,820.36 and 65,190.17

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Solution

The fourth proportional to 112,921.45, 155,820.36 and 65,190.17 is: 89,955.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,921.45 : 155,820.36 = 65,190.17 : x
  2. Step 2: Convert to fraction form
    112,921.45/155,820.36 = 65,190.17/x
  3. Step 3: Cross multiply
    112,921.45x = 155,820.36 × 65,190.17
  4. Step 4: Simplify right side
    112,921.45x = 10,157,955,757.86
  5. Step 5: Solve for x
    x = 10,157,955,757.86/112,921.45
  6. Step 6: Final answer
    x = 89,955.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.