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Finding the Fourth Proportional to 69,987.40, 104,981.10 and 25,615.60

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Solution

The fourth proportional to 69,987.40, 104,981.10 and 25,615.60 is: 38,423.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,987.40 : 104,981.10 = 25,615.60 : x
  2. Step 2: Convert to fraction form
    69,987.40/104,981.10 = 25,615.60/x
  3. Step 3: Cross multiply
    69,987.40x = 104,981.10 × 25,615.60
  4. Step 4: Simplify right side
    69,987.40x = 2,689,153,865.16
  5. Step 5: Solve for x
    x = 2,689,153,865.16/69,987.40
  6. Step 6: Final answer
    x = 38,423.40

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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.