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Finding the Fourth Proportional to 81,128.60, 121,706.70 and 24,967.43

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Solution

The fourth proportional to 81,128.60, 121,706.70 and 24,967.43 is: 37,455.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,128.60 : 121,706.70 = 24,967.43 : x
  2. Step 2: Convert to fraction form
    81,128.60/121,706.70 = 24,967.43/x
  3. Step 3: Cross multiply
    81,128.60x = 121,706.70 × 24,967.43
  4. Step 4: Simplify right side
    81,128.60x = 3,038,703,512.78
  5. Step 5: Solve for x
    x = 3,038,703,512.78/81,128.60
  6. Step 6: Final answer
    x = 37,455.39

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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.