Home / 51,881.16-77,748.12-39,990

Finding the Fourth Proportional to 51,881.16, 77,748.12 and 39,990

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Solution

The fourth proportional to 51,881.16, 77,748.12 and 39,990 is: 59,928.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,881.16 : 77,748.12 = 39,990 : x
  2. Step 2: Convert to fraction form
    51,881.16/77,748.12 = 39,990/x
  3. Step 3: Cross multiply
    51,881.16x = 77,748.12 × 39,990
  4. Step 4: Simplify right side
    51,881.16x = 3,109,147,318.80
  5. Step 5: Solve for x
    x = 3,109,147,318.80/51,881.16
  6. Step 6: Final answer
    x = 59,928.25

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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.