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Finding the Fourth Proportional to 61,873.88, 85,385.95 and 40,690.96

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Solution

The fourth proportional to 61,873.88, 85,385.95 and 40,690.96 is: 56,153.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,873.88 : 85,385.95 = 40,690.96 : x
  2. Step 2: Convert to fraction form
    61,873.88/85,385.95 = 40,690.96/x
  3. Step 3: Cross multiply
    61,873.88x = 85,385.95 × 40,690.96
  4. Step 4: Simplify right side
    61,873.88x = 3,474,435,960.82
  5. Step 5: Solve for x
    x = 3,474,435,960.82/61,873.88
  6. Step 6: Final answer
    x = 56,153.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.