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Finding the Fourth Proportional to 98,763.80, 136,293.04 and 53,440.78

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Solution

The fourth proportional to 98,763.80, 136,293.04 and 53,440.78 is: 73,747.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,763.80 : 136,293.04 = 53,440.78 : x
  2. Step 2: Convert to fraction form
    98,763.80/136,293.04 = 53,440.78/x
  3. Step 3: Cross multiply
    98,763.80x = 136,293.04 × 53,440.78
  4. Step 4: Simplify right side
    98,763.80x = 7,283,606,366.17
  5. Step 5: Solve for x
    x = 7,283,606,366.17/98,763.80
  6. Step 6: Final answer
    x = 73,747.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.