Home / 138,608.44-191,268.64-78,159.76

Finding the Fourth Proportional to 138,608.44, 191,268.64 and 78,159.76

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Solution

The fourth proportional to 138,608.44, 191,268.64 and 78,159.76 is: 107,854.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,608.44 : 191,268.64 = 78,159.76 : x
  2. Step 2: Convert to fraction form
    138,608.44/191,268.64 = 78,159.76/x
  3. Step 3: Cross multiply
    138,608.44x = 191,268.64 × 78,159.76
  4. Step 4: Simplify right side
    138,608.44x = 14,949,510,617.45
  5. Step 5: Solve for x
    x = 14,949,510,617.45/138,608.44
  6. Step 6: Final answer
    x = 107,854.26

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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.