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Finding the Fourth Proportional to 91,908.31, 126,823.69 and 51,626.50

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Solution

The fourth proportional to 91,908.31, 126,823.69 and 51,626.50 is: 71,239.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,908.31 : 126,823.69 = 51,626.50 : x
  2. Step 2: Convert to fraction form
    91,908.31/126,823.69 = 51,626.50/x
  3. Step 3: Cross multiply
    91,908.31x = 126,823.69 × 51,626.50
  4. Step 4: Simplify right side
    91,908.31x = 6,547,462,973.65
  5. Step 5: Solve for x
    x = 6,547,462,973.65/91,908.31
  6. Step 6: Final answer
    x = 71,239.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.