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Finding the Fourth Proportional to 218,803.95, 328,176.77 and 61,019.19

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Solution

The fourth proportional to 218,803.95, 328,176.77 and 61,019.19 is: 91,520.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,803.95 : 328,176.77 = 61,019.19 : x
  2. Step 2: Convert to fraction form
    218,803.95/328,176.77 = 61,019.19/x
  3. Step 3: Cross multiply
    218,803.95x = 328,176.77 × 61,019.19
  4. Step 4: Simplify right side
    218,803.95x = 20,025,080,377.12
  5. Step 5: Solve for x
    x = 20,025,080,377.12/218,803.95
  6. Step 6: Final answer
    x = 91,520.65

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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.