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Finding the Fourth Proportional to 218,874.40, 328,117.20 and 130,033.60

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Solution

The fourth proportional to 218,874.40, 328,117.20 and 130,033.60 is: 194,934.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,874.40 : 328,117.20 = 130,033.60 : x
  2. Step 2: Convert to fraction form
    218,874.40/328,117.20 = 130,033.60/x
  3. Step 3: Cross multiply
    218,874.40x = 328,117.20 × 130,033.60
  4. Step 4: Simplify right side
    218,874.40x = 42,666,260,737.92
  5. Step 5: Solve for x
    x = 42,666,260,737.92/218,874.40
  6. Step 6: Final answer
    x = 194,934.91

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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.