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Finding the Fourth Proportional to 110,648.80, 165,729.36 and 91,455.52

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Solution

The fourth proportional to 110,648.80, 165,729.36 and 91,455.52 is: 136,981.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,648.80 : 165,729.36 = 91,455.52 : x
  2. Step 2: Convert to fraction form
    110,648.80/165,729.36 = 91,455.52/x
  3. Step 3: Cross multiply
    110,648.80x = 165,729.36 × 91,455.52
  4. Step 4: Simplify right side
    110,648.80x = 15,156,864,798.07
  5. Step 5: Solve for x
    x = 15,156,864,798.07/110,648.80
  6. Step 6: Final answer
    x = 136,981.74

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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.