Home / 87,731.29-121,078.56-53,762.32

Finding the Fourth Proportional to 87,731.29, 121,078.56 and 53,762.32

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Solution

The fourth proportional to 87,731.29, 121,078.56 and 53,762.32 is: 74,197.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,731.29 : 121,078.56 = 53,762.32 : x
  2. Step 2: Convert to fraction form
    87,731.29/121,078.56 = 53,762.32/x
  3. Step 3: Cross multiply
    87,731.29x = 121,078.56 × 53,762.32
  4. Step 4: Simplify right side
    87,731.29x = 6,509,464,287.86
  5. Step 5: Solve for x
    x = 6,509,464,287.86/87,731.29
  6. Step 6: Final answer
    x = 74,197.75

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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.