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Finding the Fourth Proportional to 61,408.40, 92,112.60 and 45,856.40

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Solution

The fourth proportional to 61,408.40, 92,112.60 and 45,856.40 is: 68,784.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,408.40 : 92,112.60 = 45,856.40 : x
  2. Step 2: Convert to fraction form
    61,408.40/92,112.60 = 45,856.40/x
  3. Step 3: Cross multiply
    61,408.40x = 92,112.60 × 45,856.40
  4. Step 4: Simplify right side
    61,408.40x = 4,223,952,230.64
  5. Step 5: Solve for x
    x = 4,223,952,230.64/61,408.40
  6. Step 6: Final answer
    x = 68,784.60

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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.