Home / 87,678.42-121,003.64-49,445.34

Finding the Fourth Proportional to 87,678.42, 121,003.64 and 49,445.34

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Solution

The fourth proportional to 87,678.42, 121,003.64 and 49,445.34 is: 68,238.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,678.42 : 121,003.64 = 49,445.34 : x
  2. Step 2: Convert to fraction form
    87,678.42/121,003.64 = 49,445.34/x
  3. Step 3: Cross multiply
    87,678.42x = 121,003.64 × 49,445.34
  4. Step 4: Simplify right side
    87,678.42x = 5,983,065,268.79
  5. Step 5: Solve for x
    x = 5,983,065,268.79/87,678.42
  6. Step 6: Final answer
    x = 68,238.75

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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.