Home / 218,731.19-328,085.84-85,635.83

Finding the Fourth Proportional to 218,731.19, 328,085.84 and 85,635.83

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Solution

The fourth proportional to 218,731.19, 328,085.84 and 85,635.83 is: 128,449.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,731.19 : 328,085.84 = 85,635.83 : x
  2. Step 2: Convert to fraction form
    218,731.19/328,085.84 = 85,635.83/x
  3. Step 3: Cross multiply
    218,731.19x = 328,085.84 × 85,635.83
  4. Step 4: Simplify right side
    218,731.19x = 28,095,904,253.95
  5. Step 5: Solve for x
    x = 28,095,904,253.95/218,731.19
  6. Step 6: Final answer
    x = 128,449.47

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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.