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Finding the Fourth Proportional to 88,180.78, 121,622.79 and 61,309.84

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Solution

The fourth proportional to 88,180.78, 121,622.79 and 61,309.84 is: 84,561.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,180.78 : 121,622.79 = 61,309.84 : x
  2. Step 2: Convert to fraction form
    88,180.78/121,622.79 = 61,309.84/x
  3. Step 3: Cross multiply
    88,180.78x = 121,622.79 × 61,309.84
  4. Step 4: Simplify right side
    88,180.78x = 7,456,673,721.11
  5. Step 5: Solve for x
    x = 7,456,673,721.11/88,180.78
  6. Step 6: Final answer
    x = 84,561.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.