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Finding the Fourth Proportional to 101,622.78, 140,244.48 and 61,335.90

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Solution

The fourth proportional to 101,622.78, 140,244.48 and 61,335.90 is: 84,646.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,622.78 : 140,244.48 = 61,335.90 : x
  2. Step 2: Convert to fraction form
    101,622.78/140,244.48 = 61,335.90/x
  3. Step 3: Cross multiply
    101,622.78x = 140,244.48 × 61,335.90
  4. Step 4: Simplify right side
    101,622.78x = 8,602,021,400.83
  5. Step 5: Solve for x
    x = 8,602,021,400.83/101,622.78
  6. Step 6: Final answer
    x = 84,646.59

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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.