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Finding the Fourth Proportional to 155,103.48, 213,988.30 and 101,419.92

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Solution

The fourth proportional to 155,103.48, 213,988.30 and 101,419.92 is: 139,923.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,103.48 : 213,988.30 = 101,419.92 : x
  2. Step 2: Convert to fraction form
    155,103.48/213,988.30 = 101,419.92/x
  3. Step 3: Cross multiply
    155,103.48x = 213,988.30 × 101,419.92
  4. Step 4: Simplify right side
    155,103.48x = 21,702,676,013.39
  5. Step 5: Solve for x
    x = 21,702,676,013.39/155,103.48
  6. Step 6: Final answer
    x = 139,923.85

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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.