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Finding the Fourth Proportional to 91,976, 137,848.58 and 39,323.60

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Solution

The fourth proportional to 91,976, 137,848.58 and 39,323.60 is: 58,936.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,976 : 137,848.58 = 39,323.60 : x
  2. Step 2: Convert to fraction form
    91,976/137,848.58 = 39,323.60/x
  3. Step 3: Cross multiply
    91,976x = 137,848.58 × 39,323.60
  4. Step 4: Simplify right side
    91,976x = 5,420,702,420.49
  5. Step 5: Solve for x
    x = 5,420,702,420.49/91,976
  6. Step 6: Final answer
    x = 58,936.05

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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.