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Finding the Fourth Proportional to 65,555.66, 90,441.06 and 40,361.42

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Solution

The fourth proportional to 65,555.66, 90,441.06 and 40,361.42 is: 55,682.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,555.66 : 90,441.06 = 40,361.42 : x
  2. Step 2: Convert to fraction form
    65,555.66/90,441.06 = 40,361.42/x
  3. Step 3: Cross multiply
    65,555.66x = 90,441.06 × 40,361.42
  4. Step 4: Simplify right side
    65,555.66x = 3,650,329,607.91
  5. Step 5: Solve for x
    x = 3,650,329,607.91/65,555.66
  6. Step 6: Final answer
    x = 55,682.91

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1.5x scale

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.