Home / 218,921.81-328,280.65-113,712.53

Finding the Fourth Proportional to 218,921.81, 328,280.65 and 113,712.53

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Solution

The fourth proportional to 218,921.81, 328,280.65 and 113,712.53 is: 170,515.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,921.81 : 328,280.65 = 113,712.53 : x
  2. Step 2: Convert to fraction form
    218,921.81/328,280.65 = 113,712.53/x
  3. Step 3: Cross multiply
    218,921.81x = 328,280.65 × 113,712.53
  4. Step 4: Simplify right side
    218,921.81x = 37,329,623,261.54
  5. Step 5: Solve for x
    x = 37,329,623,261.54/218,921.81
  6. Step 6: Final answer
    x = 170,515.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.