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Finding the Fourth Proportional to 80,703.54, 121,075.29 and 28,113.48

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Solution

The fourth proportional to 80,703.54, 121,075.29 and 28,113.48 is: 42,177.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,703.54 : 121,075.29 = 28,113.48 : x
  2. Step 2: Convert to fraction form
    80,703.54/121,075.29 = 28,113.48/x
  3. Step 3: Cross multiply
    80,703.54x = 121,075.29 × 28,113.48
  4. Step 4: Simplify right side
    80,703.54x = 3,403,847,743.91
  5. Step 5: Solve for x
    x = 3,403,847,743.91/80,703.54
  6. Step 6: Final answer
    x = 42,177.18

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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.