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Finding the Fourth Proportional to 219,092.80, 328,639.20 and 124,614.40

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Solution

The fourth proportional to 219,092.80, 328,639.20 and 124,614.40 is: 186,921.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,092.80 : 328,639.20 = 124,614.40 : x
  2. Step 2: Convert to fraction form
    219,092.80/328,639.20 = 124,614.40/x
  3. Step 3: Cross multiply
    219,092.80x = 328,639.20 × 124,614.40
  4. Step 4: Simplify right side
    219,092.80x = 40,953,176,724.48
  5. Step 5: Solve for x
    x = 40,953,176,724.48/219,092.80
  6. Step 6: Final answer
    x = 186,921.60

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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.