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Finding the Fourth Proportional to 261,361.22, 392,041.84 and 74,372.72

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Solution

The fourth proportional to 261,361.22, 392,041.84 and 74,372.72 is: 111,559.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,361.22 : 392,041.84 = 74,372.72 : x
  2. Step 2: Convert to fraction form
    261,361.22/392,041.84 = 74,372.72/x
  3. Step 3: Cross multiply
    261,361.22x = 392,041.84 × 74,372.72
  4. Step 4: Simplify right side
    261,361.22x = 29,157,217,994.60
  5. Step 5: Solve for x
    x = 29,157,217,994.60/261,361.22
  6. Step 6: Final answer
    x = 111,559.08

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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.