Home / 81,199.50-121,818.78-25,795.50

Finding the Fourth Proportional to 81,199.50, 121,818.78 and 25,795.50

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Solution

The fourth proportional to 81,199.50, 121,818.78 and 25,795.50 is: 38,699.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,199.50 : 121,818.78 = 25,795.50 : x
  2. Step 2: Convert to fraction form
    81,199.50/121,818.78 = 25,795.50/x
  3. Step 3: Cross multiply
    81,199.50x = 121,818.78 × 25,795.50
  4. Step 4: Simplify right side
    81,199.50x = 3,142,376,339.49
  5. Step 5: Solve for x
    x = 3,142,376,339.49/81,199.50
  6. Step 6: Final answer
    x = 38,699.45

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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.