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Finding the Fourth Proportional to 53,372.86, 80,060.90 and 18,312

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Solution

The fourth proportional to 53,372.86, 80,060.90 and 18,312 is: 27,468.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,372.86 : 80,060.90 = 18,312 : x
  2. Step 2: Convert to fraction form
    53,372.86/80,060.90 = 18,312/x
  3. Step 3: Cross multiply
    53,372.86x = 80,060.90 × 18,312
  4. Step 4: Simplify right side
    53,372.86x = 1,466,075,200.80
  5. Step 5: Solve for x
    x = 1,466,075,200.80/53,372.86
  6. Step 6: Final answer
    x = 27,468.55

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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.