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Finding the Fourth Proportional to 218,820.10, 328,230.15 and 130,027.90

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Solution

The fourth proportional to 218,820.10, 328,230.15 and 130,027.90 is: 195,041.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,820.10 : 328,230.15 = 130,027.90 : x
  2. Step 2: Convert to fraction form
    218,820.10/328,230.15 = 130,027.90/x
  3. Step 3: Cross multiply
    218,820.10x = 328,230.15 × 130,027.90
  4. Step 4: Simplify right side
    218,820.10x = 42,679,077,121.19
  5. Step 5: Solve for x
    x = 42,679,077,121.19/218,820.10
  6. Step 6: Final answer
    x = 195,041.85

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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.