Home / 52,099.40-78,134.70-20,937.80

Finding the Fourth Proportional to 52,099.40, 78,134.70 and 20,937.80

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Solution

The fourth proportional to 52,099.40, 78,134.70 and 20,937.80 is: 31,400.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,099.40 : 78,134.70 = 20,937.80 : x
  2. Step 2: Convert to fraction form
    52,099.40/78,134.70 = 20,937.80/x
  3. Step 3: Cross multiply
    52,099.40x = 78,134.70 × 20,937.80
  4. Step 4: Simplify right side
    52,099.40x = 1,635,968,721.66
  5. Step 5: Solve for x
    x = 1,635,968,721.66/52,099.40
  6. Step 6: Final answer
    x = 31,400.91

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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.