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Finding the Fourth Proportional to 97,785.40, 146,418.90 and 77,049.40

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Solution

The fourth proportional to 97,785.40, 146,418.90 and 77,049.40 is: 115,369.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,785.40 : 146,418.90 = 77,049.40 : x
  2. Step 2: Convert to fraction form
    97,785.40/146,418.90 = 77,049.40/x
  3. Step 3: Cross multiply
    97,785.40x = 146,418.90 × 77,049.40
  4. Step 4: Simplify right side
    97,785.40x = 11,281,488,393.66
  5. Step 5: Solve for x
    x = 11,281,488,393.66/97,785.40
  6. Step 6: Final answer
    x = 115,369.86

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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.