Home / 87,831.95-121,277.96-81,115.12

Finding the Fourth Proportional to 87,831.95, 121,277.96 and 81,115.12

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Solution

The fourth proportional to 87,831.95, 121,277.96 and 81,115.12 is: 112,003.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,831.95 : 121,277.96 = 81,115.12 : x
  2. Step 2: Convert to fraction form
    87,831.95/121,277.96 = 81,115.12/x
  3. Step 3: Cross multiply
    87,831.95x = 121,277.96 × 81,115.12
  4. Step 4: Simplify right side
    87,831.95x = 9,837,476,328.96
  5. Step 5: Solve for x
    x = 9,837,476,328.96/87,831.95
  6. Step 6: Final answer
    x = 112,003.40

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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.