Home / 159,451.12-220,042.80-87,831.36

Finding the Fourth Proportional to 159,451.12, 220,042.80 and 87,831.36

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Solution

The fourth proportional to 159,451.12, 220,042.80 and 87,831.36 is: 121,207.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,451.12 : 220,042.80 = 87,831.36 : x
  2. Step 2: Convert to fraction form
    159,451.12/220,042.80 = 87,831.36/x
  3. Step 3: Cross multiply
    159,451.12x = 220,042.80 × 87,831.36
  4. Step 4: Simplify right side
    159,451.12x = 19,326,658,382.21
  5. Step 5: Solve for x
    x = 19,326,658,382.21/159,451.12
  6. Step 6: Final answer
    x = 121,207.42

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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.