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Finding the Fourth Proportional to 218,848.80, 328,532.40 and 124,154.40

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Solution

The fourth proportional to 218,848.80, 328,532.40 and 124,154.40 is: 186,378.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,848.80 : 328,532.40 = 124,154.40 : x
  2. Step 2: Convert to fraction form
    218,848.80/328,532.40 = 124,154.40/x
  3. Step 3: Cross multiply
    218,848.80x = 328,532.40 × 124,154.40
  4. Step 4: Simplify right side
    218,848.80x = 40,788,743,002.56
  5. Step 5: Solve for x
    x = 40,788,743,002.56/218,848.80
  6. Step 6: Final answer
    x = 186,378.65

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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.