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Finding the Fourth Proportional to 101,770.88, 140,431.20 and 61,477.92

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Solution

The fourth proportional to 101,770.88, 140,431.20 and 61,477.92 is: 84,831.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,770.88 : 140,431.20 = 61,477.92 : x
  2. Step 2: Convert to fraction form
    101,770.88/140,431.20 = 61,477.92/x
  3. Step 3: Cross multiply
    101,770.88x = 140,431.20 × 61,477.92
  4. Step 4: Simplify right side
    101,770.88x = 8,633,418,079.10
  5. Step 5: Solve for x
    x = 8,633,418,079.10/101,770.88
  6. Step 6: Final answer
    x = 84,831.91

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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.