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Finding the Fourth Proportional to 218,847.80, 328,530.90 and 124,153.40

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Solution

The fourth proportional to 218,847.80, 328,530.90 and 124,153.40 is: 186,377.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,847.80 : 328,530.90 = 124,153.40 : x
  2. Step 2: Convert to fraction form
    218,847.80/328,530.90 = 124,153.40/x
  3. Step 3: Cross multiply
    218,847.80x = 328,530.90 × 124,153.40
  4. Step 4: Simplify right side
    218,847.80x = 40,788,228,240.06
  5. Step 5: Solve for x
    x = 40,788,228,240.06/218,847.80
  6. Step 6: Final answer
    x = 186,377.15

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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.