Home / 212,118.95-318,129.22-79,061.87

Finding the Fourth Proportional to 212,118.95, 318,129.22 and 79,061.87

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Solution

The fourth proportional to 212,118.95, 318,129.22 and 79,061.87 is: 118,574.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,118.95 : 318,129.22 = 79,061.87 : x
  2. Step 2: Convert to fraction form
    212,118.95/318,129.22 = 79,061.87/x
  3. Step 3: Cross multiply
    212,118.95x = 318,129.22 × 79,061.87
  4. Step 4: Simplify right side
    212,118.95x = 25,151,891,928.99
  5. Step 5: Solve for x
    x = 25,151,891,928.99/212,118.95
  6. Step 6: Final answer
    x = 118,574.47

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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.