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Finding the Fourth Proportional to 91,980.58, 137,937.60 and 49,817.94

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Solution

The fourth proportional to 91,980.58, 137,937.60 and 49,817.94 is: 74,708.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,980.58 : 137,937.60 = 49,817.94 : x
  2. Step 2: Convert to fraction form
    91,980.58/137,937.60 = 49,817.94/x
  3. Step 3: Cross multiply
    91,980.58x = 137,937.60 × 49,817.94
  4. Step 4: Simplify right side
    91,980.58x = 6,871,767,080.54
  5. Step 5: Solve for x
    x = 6,871,767,080.54/91,980.58
  6. Step 6: Final answer
    x = 74,708.89

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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.