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Finding the Fourth Proportional to 217,842.40, 326,686.80 and 77,605.60

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Solution

The fourth proportional to 217,842.40, 326,686.80 and 77,605.60 is: 116,381.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,842.40 : 326,686.80 = 77,605.60 : x
  2. Step 2: Convert to fraction form
    217,842.40/326,686.80 = 77,605.60/x
  3. Step 3: Cross multiply
    217,842.40x = 326,686.80 × 77,605.60
  4. Step 4: Simplify right side
    217,842.40x = 25,352,725,126.08
  5. Step 5: Solve for x
    x = 25,352,725,126.08/217,842.40
  6. Step 6: Final answer
    x = 116,381.04

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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.