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Finding the Fourth Proportional to 101,480.80, 140,043.77 and 56,161.90

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Solution

The fourth proportional to 101,480.80, 140,043.77 and 56,161.90 is: 77,503.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,480.80 : 140,043.77 = 56,161.90 : x
  2. Step 2: Convert to fraction form
    101,480.80/140,043.77 = 56,161.90/x
  3. Step 3: Cross multiply
    101,480.80x = 140,043.77 × 56,161.90
  4. Step 4: Simplify right side
    101,480.80x = 7,865,124,981.34
  5. Step 5: Solve for x
    x = 7,865,124,981.34/101,480.80
  6. Step 6: Final answer
    x = 77,503.58

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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.