Home / 218,568.24-301,639.75-121,780.13

Finding the Fourth Proportional to 218,568.24, 301,639.75 and 121,780.13

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Solution

The fourth proportional to 218,568.24, 301,639.75 and 121,780.13 is: 168,065.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,568.24 : 301,639.75 = 121,780.13 : x
  2. Step 2: Convert to fraction form
    218,568.24/301,639.75 = 121,780.13/x
  3. Step 3: Cross multiply
    218,568.24x = 301,639.75 × 121,780.13
  4. Step 4: Simplify right side
    218,568.24x = 36,733,726,155.52
  5. Step 5: Solve for x
    x = 36,733,726,155.52/218,568.24
  6. Step 6: Final answer
    x = 168,065.25

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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.