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Finding the Fourth Proportional to 52,561.70, 78,842.55 and 40,811.30

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Solution

The fourth proportional to 52,561.70, 78,842.55 and 40,811.30 is: 61,216.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,561.70 : 78,842.55 = 40,811.30 : x
  2. Step 2: Convert to fraction form
    52,561.70/78,842.55 = 40,811.30/x
  3. Step 3: Cross multiply
    52,561.70x = 78,842.55 × 40,811.30
  4. Step 4: Simplify right side
    52,561.70x = 3,217,666,960.82
  5. Step 5: Solve for x
    x = 3,217,666,960.82/52,561.70
  6. Step 6: Final answer
    x = 61,216.95

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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.