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Finding the Fourth Proportional to 69,897.90, 104,956.20 and 53,276.70

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Solution

The fourth proportional to 69,897.90, 104,956.20 and 53,276.70 is: 79,998.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,897.90 : 104,956.20 = 53,276.70 : x
  2. Step 2: Convert to fraction form
    69,897.90/104,956.20 = 53,276.70/x
  3. Step 3: Cross multiply
    69,897.90x = 104,956.20 × 53,276.70
  4. Step 4: Simplify right side
    69,897.90x = 5,591,719,980.54
  5. Step 5: Solve for x
    x = 5,591,719,980.54/69,897.90
  6. Step 6: Final answer
    x = 79,998.40

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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.