Home / 138,962.20-191,767.02-78,552.40

Finding the Fourth Proportional to 138,962.20, 191,767.02 and 78,552.40

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Solution

The fourth proportional to 138,962.20, 191,767.02 and 78,552.40 is: 108,401.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,962.20 : 191,767.02 = 78,552.40 : x
  2. Step 2: Convert to fraction form
    138,962.20/191,767.02 = 78,552.40/x
  3. Step 3: Cross multiply
    138,962.20x = 191,767.02 × 78,552.40
  4. Step 4: Simplify right side
    138,962.20x = 15,063,759,661.85
  5. Step 5: Solve for x
    x = 15,063,759,661.85/138,962.20
  6. Step 6: Final answer
    x = 108,401.85

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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.