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Finding the Fourth Proportional to 87,681.88, 121,008.90 and 49,968.28

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Solution

The fourth proportional to 87,681.88, 121,008.90 and 49,968.28 is: 68,960.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,681.88 : 121,008.90 = 49,968.28 : x
  2. Step 2: Convert to fraction form
    87,681.88/121,008.90 = 49,968.28/x
  3. Step 3: Cross multiply
    87,681.88x = 121,008.90 × 49,968.28
  4. Step 4: Simplify right side
    87,681.88x = 6,046,606,597.69
  5. Step 5: Solve for x
    x = 6,046,606,597.69/87,681.88
  6. Step 6: Final answer
    x = 68,960.73

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1.5x scale

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.