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Finding the Fourth Proportional to 80,075.79, 120,154.79 and 35,731.53

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Solution

The fourth proportional to 80,075.79, 120,154.79 and 35,731.53 is: 53,615.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,075.79 : 120,154.79 = 35,731.53 : x
  2. Step 2: Convert to fraction form
    80,075.79/120,154.79 = 35,731.53/x
  3. Step 3: Cross multiply
    80,075.79x = 120,154.79 × 35,731.53
  4. Step 4: Simplify right side
    80,075.79x = 4,293,314,572.86
  5. Step 5: Solve for x
    x = 4,293,314,572.86/80,075.79
  6. Step 6: Final answer
    x = 53,615.64

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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.