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Finding the Fourth Proportional to 218,870.80, 328,565.40 and 124,176.40

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Solution

The fourth proportional to 218,870.80, 328,565.40 and 124,176.40 is: 186,411.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,870.80 : 328,565.40 = 124,176.40 : x
  2. Step 2: Convert to fraction form
    218,870.80/328,565.40 = 124,176.40/x
  3. Step 3: Cross multiply
    218,870.80x = 328,565.40 × 124,176.40
  4. Step 4: Simplify right side
    218,870.80x = 40,800,068,536.56
  5. Step 5: Solve for x
    x = 40,800,068,536.56/218,870.80
  6. Step 6: Final answer
    x = 186,411.66

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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.