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Finding the Fourth Proportional to 87,710.50, 121,040.49 and 47,966.50

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Solution

The fourth proportional to 87,710.50, 121,040.49 and 47,966.50 is: 66,193.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,710.50 : 121,040.49 = 47,966.50 : x
  2. Step 2: Convert to fraction form
    87,710.50/121,040.49 = 47,966.50/x
  3. Step 3: Cross multiply
    87,710.50x = 121,040.49 × 47,966.50
  4. Step 4: Simplify right side
    87,710.50x = 5,805,888,663.59
  5. Step 5: Solve for x
    x = 5,805,888,663.59/87,710.50
  6. Step 6: Final answer
    x = 66,193.77

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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.