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Finding the Fourth Proportional to 87,681.61, 121,000.60 and 47,395.35

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Solution

The fourth proportional to 87,681.61, 121,000.60 and 47,395.35 is: 65,405.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,681.61 : 121,000.60 = 47,395.35 : x
  2. Step 2: Convert to fraction form
    87,681.61/121,000.60 = 47,395.35/x
  3. Step 3: Cross multiply
    87,681.61x = 121,000.60 × 47,395.35
  4. Step 4: Simplify right side
    87,681.61x = 5,734,865,550.23
  5. Step 5: Solve for x
    x = 5,734,865,550.23/87,681.61
  6. Step 6: Final answer
    x = 65,405.57

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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.