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Finding the Fourth Proportional to 218,858.80, 328,547.40 and 124,164.40

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Solution

The fourth proportional to 218,858.80, 328,547.40 and 124,164.40 is: 186,393.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,858.80 : 328,547.40 = 124,164.40 : x
  2. Step 2: Convert to fraction form
    218,858.80/328,547.40 = 124,164.40/x
  3. Step 3: Cross multiply
    218,858.80x = 328,547.40 × 124,164.40
  4. Step 4: Simplify right side
    218,858.80x = 40,793,890,792.56
  5. Step 5: Solve for x
    x = 40,793,890,792.56/218,858.80
  6. Step 6: Final answer
    x = 186,393.65

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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.