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Finding the Fourth Proportional to 61,361.53, 91,931.06 and 28,109.41

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Solution

The fourth proportional to 61,361.53, 91,931.06 and 28,109.41 is: 42,113.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,361.53 : 91,931.06 = 28,109.41 : x
  2. Step 2: Convert to fraction form
    61,361.53/91,931.06 = 28,109.41/x
  3. Step 3: Cross multiply
    61,361.53x = 91,931.06 × 28,109.41
  4. Step 4: Simplify right side
    61,361.53x = 2,584,127,716.73
  5. Step 5: Solve for x
    x = 2,584,127,716.73/61,361.53
  6. Step 6: Final answer
    x = 42,113.16

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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.