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Finding the Fourth Proportional to 81,008.48, 121,518.48 and 25,604

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Solution

The fourth proportional to 81,008.48, 121,518.48 and 25,604 is: 38,407.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,008.48 : 121,518.48 = 25,604 : x
  2. Step 2: Convert to fraction form
    81,008.48/121,518.48 = 25,604/x
  3. Step 3: Cross multiply
    81,008.48x = 121,518.48 × 25,604
  4. Step 4: Simplify right side
    81,008.48x = 3,111,359,161.92
  5. Step 5: Solve for x
    x = 3,111,359,161.92/81,008.48
  6. Step 6: Final answer
    x = 38,407.82

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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.