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Finding the Fourth Proportional to 61,278.10, 91,917.15 and 40,282.90

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Solution

The fourth proportional to 61,278.10, 91,917.15 and 40,282.90 is: 60,424.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,278.10 : 91,917.15 = 40,282.90 : x
  2. Step 2: Convert to fraction form
    61,278.10/91,917.15 = 40,282.90/x
  3. Step 3: Cross multiply
    61,278.10x = 91,917.15 × 40,282.90
  4. Step 4: Simplify right side
    61,278.10x = 3,702,689,361.74
  5. Step 5: Solve for x
    x = 3,702,689,361.74/61,278.10
  6. Step 6: Final answer
    x = 60,424.35

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1.5x scale

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.