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Finding the Fourth Proportional to 61,120.40, 91,826.40 and 54,705.20

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Solution

The fourth proportional to 61,120.40, 91,826.40 and 54,705.20 is: 82,188.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,120.40 : 91,826.40 = 54,705.20 : x
  2. Step 2: Convert to fraction form
    61,120.40/91,826.40 = 54,705.20/x
  3. Step 3: Cross multiply
    61,120.40x = 91,826.40 × 54,705.20
  4. Step 4: Simplify right side
    61,120.40x = 5,023,381,577.28
  5. Step 5: Solve for x
    x = 5,023,381,577.28/61,120.40
  6. Step 6: Final answer
    x = 82,188.30

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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.