Home / 87,907.37-121,311.65-47,621.90

Finding the Fourth Proportional to 87,907.37, 121,311.65 and 47,621.90

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Solution

The fourth proportional to 87,907.37, 121,311.65 and 47,621.90 is: 65,717.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,907.37 : 121,311.65 = 47,621.90 : x
  2. Step 2: Convert to fraction form
    87,907.37/121,311.65 = 47,621.90/x
  3. Step 3: Cross multiply
    87,907.37x = 121,311.65 × 47,621.90
  4. Step 4: Simplify right side
    87,907.37x = 5,777,090,420.47
  5. Step 5: Solve for x
    x = 5,777,090,420.47/87,907.37
  6. Step 6: Final answer
    x = 65,717.93

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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.