Home / 87,975.64-121,403.16-47,688.56

Finding the Fourth Proportional to 87,975.64, 121,403.16 and 47,688.56

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Solution

The fourth proportional to 87,975.64, 121,403.16 and 47,688.56 is: 65,808.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,975.64 : 121,403.16 = 47,688.56 : x
  2. Step 2: Convert to fraction form
    87,975.64/121,403.16 = 47,688.56/x
  3. Step 3: Cross multiply
    87,975.64x = 121,403.16 × 47,688.56
  4. Step 4: Simplify right side
    87,975.64x = 5,789,541,879.85
  5. Step 5: Solve for x
    x = 5,789,541,879.85/87,975.64
  6. Step 6: Final answer
    x = 65,808.47

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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.