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Finding the Fourth Proportional to 87,706.98, 121,035.64 and 47,420.72

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Solution

The fourth proportional to 87,706.98, 121,035.64 and 47,420.72 is: 65,440.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,706.98 : 121,035.64 = 47,420.72 : x
  2. Step 2: Convert to fraction form
    87,706.98/121,035.64 = 47,420.72/x
  3. Step 3: Cross multiply
    87,706.98x = 121,035.64 × 47,420.72
  4. Step 4: Simplify right side
    87,706.98x = 5,739,597,194.46
  5. Step 5: Solve for x
    x = 5,739,597,194.46/87,706.98
  6. Step 6: Final answer
    x = 65,440.60

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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.