Home / 80,739.84-121,075.20-28,133.76

Finding the Fourth Proportional to 80,739.84, 121,075.20 and 28,133.76

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Solution

The fourth proportional to 80,739.84, 121,075.20 and 28,133.76 is: 42,188.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,739.84 : 121,075.20 = 28,133.76 : x
  2. Step 2: Convert to fraction form
    80,739.84/121,075.20 = 28,133.76/x
  3. Step 3: Cross multiply
    80,739.84x = 121,075.20 × 28,133.76
  4. Step 4: Simplify right side
    80,739.84x = 3,406,300,618.75
  5. Step 5: Solve for x
    x = 3,406,300,618.75/80,739.84
  6. Step 6: Final answer
    x = 42,188.60

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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.