Home / 51,387.60-77,081.40-39,709.20

Finding the Fourth Proportional to 51,387.60, 77,081.40 and 39,709.20

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Solution

The fourth proportional to 51,387.60, 77,081.40 and 39,709.20 is: 59,563.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,387.60 : 77,081.40 = 39,709.20 : x
  2. Step 2: Convert to fraction form
    51,387.60/77,081.40 = 39,709.20/x
  3. Step 3: Cross multiply
    51,387.60x = 77,081.40 × 39,709.20
  4. Step 4: Simplify right side
    51,387.60x = 3,060,840,728.88
  5. Step 5: Solve for x
    x = 3,060,840,728.88/51,387.60
  6. Step 6: Final answer
    x = 59,563.80

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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.