Home / 138,821.52-191,574.18-75,159.60

Finding the Fourth Proportional to 138,821.52, 191,574.18 and 75,159.60

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Solution

The fourth proportional to 138,821.52, 191,574.18 and 75,159.60 is: 103,720.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,821.52 : 191,574.18 = 75,159.60 : x
  2. Step 2: Convert to fraction form
    138,821.52/191,574.18 = 75,159.60/x
  3. Step 3: Cross multiply
    138,821.52x = 191,574.18 × 75,159.60
  4. Step 4: Simplify right side
    138,821.52x = 14,398,638,739.13
  5. Step 5: Solve for x
    x = 14,398,638,739.13/138,821.52
  6. Step 6: Final answer
    x = 103,720.51

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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.