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Finding the Fourth Proportional to 61,687.74, 92,408.28 and 28,362.18

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Solution

The fourth proportional to 61,687.74, 92,408.28 and 28,362.18 is: 42,486.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,687.74 : 92,408.28 = 28,362.18 : x
  2. Step 2: Convert to fraction form
    61,687.74/92,408.28 = 28,362.18/x
  3. Step 3: Cross multiply
    61,687.74x = 92,408.28 × 28,362.18
  4. Step 4: Simplify right side
    61,687.74x = 2,620,900,270.85
  5. Step 5: Solve for x
    x = 2,620,900,270.85/61,687.74
  6. Step 6: Final answer
    x = 42,486.57

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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.