Home / 212,113.62-318,087.05-77,145.65

Finding the Fourth Proportional to 212,113.62, 318,087.05 and 77,145.65

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Solution

The fourth proportional to 212,113.62, 318,087.05 and 77,145.65 is: 115,688.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,113.62 : 318,087.05 = 77,145.65 : x
  2. Step 2: Convert to fraction form
    212,113.62/318,087.05 = 77,145.65/x
  3. Step 3: Cross multiply
    212,113.62x = 318,087.05 × 77,145.65
  4. Step 4: Simplify right side
    212,113.62x = 24,539,030,252.67
  5. Step 5: Solve for x
    x = 24,539,030,252.67/212,113.62
  6. Step 6: Final answer
    x = 115,688.14

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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.