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Finding the Fourth Proportional to 53,307.20, 79,960.80 and 50,715.20

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Solution

The fourth proportional to 53,307.20, 79,960.80 and 50,715.20 is: 76,072.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,307.20 : 79,960.80 = 50,715.20 : x
  2. Step 2: Convert to fraction form
    53,307.20/79,960.80 = 50,715.20/x
  3. Step 3: Cross multiply
    53,307.20x = 79,960.80 × 50,715.20
  4. Step 4: Simplify right side
    53,307.20x = 4,055,227,964.16
  5. Step 5: Solve for x
    x = 4,055,227,964.16/53,307.20
  6. Step 6: Final answer
    x = 76,072.80

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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.