Home / 138,821.36-191,573.60-75,159.20

Finding the Fourth Proportional to 138,821.36, 191,573.60 and 75,159.20

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Solution

The fourth proportional to 138,821.36, 191,573.60 and 75,159.20 is: 103,719.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,821.36 : 191,573.60 = 75,159.20 : x
  2. Step 2: Convert to fraction form
    138,821.36/191,573.60 = 75,159.20/x
  3. Step 3: Cross multiply
    138,821.36x = 191,573.60 × 75,159.20
  4. Step 4: Simplify right side
    138,821.36x = 14,398,518,517.12
  5. Step 5: Solve for x
    x = 14,398,518,517.12/138,821.36
  6. Step 6: Final answer
    x = 103,719.76

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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.