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Finding the Fourth Proportional to 131,290.80, 196,498.80 and 115,544.40

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Solution

The fourth proportional to 131,290.80, 196,498.80 and 115,544.40 is: 172,931.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,290.80 : 196,498.80 = 115,544.40 : x
  2. Step 2: Convert to fraction form
    131,290.80/196,498.80 = 115,544.40/x
  3. Step 3: Cross multiply
    131,290.80x = 196,498.80 × 115,544.40
  4. Step 4: Simplify right side
    131,290.80x = 22,704,335,946.72
  5. Step 5: Solve for x
    x = 22,704,335,946.72/131,290.80
  6. Step 6: Final answer
    x = 172,931.66

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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.