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Finding the Fourth Proportional to 91,871.02, 137,678.14 and 49,660.08

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Solution

The fourth proportional to 91,871.02, 137,678.14 and 49,660.08 is: 74,420.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,871.02 : 137,678.14 = 49,660.08 : x
  2. Step 2: Convert to fraction form
    91,871.02/137,678.14 = 49,660.08/x
  3. Step 3: Cross multiply
    91,871.02x = 137,678.14 × 49,660.08
  4. Step 4: Simplify right side
    91,871.02x = 6,837,107,446.65
  5. Step 5: Solve for x
    x = 6,837,107,446.65/91,871.02
  6. Step 6: Final answer
    x = 74,420.72

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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.