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Finding the Fourth Proportional to 91,681, 126,521.70 and 51,937

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Solution

The fourth proportional to 91,681, 126,521.70 and 51,937 is: 71,674.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,681 : 126,521.70 = 51,937 : x
  2. Step 2: Convert to fraction form
    91,681/126,521.70 = 51,937/x
  3. Step 3: Cross multiply
    91,681x = 126,521.70 × 51,937
  4. Step 4: Simplify right side
    91,681x = 6,571,157,532.90
  5. Step 5: Solve for x
    x = 6,571,157,532.90/91,681
  6. Step 6: Final answer
    x = 71,674.15

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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.