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Finding the Fourth Proportional to 51,988.80, 78,002.40 and 50,068.80

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Solution

The fourth proportional to 51,988.80, 78,002.40 and 50,068.80 is: 75,121.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,988.80 : 78,002.40 = 50,068.80 : x
  2. Step 2: Convert to fraction form
    51,988.80/78,002.40 = 50,068.80/x
  3. Step 3: Cross multiply
    51,988.80x = 78,002.40 × 50,068.80
  4. Step 4: Simplify right side
    51,988.80x = 3,905,486,565.12
  5. Step 5: Solve for x
    x = 3,905,486,565.12/51,988.80
  6. Step 6: Final answer
    x = 75,121.69

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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.