Home / 87,721.47-121,055.72-47,435.25

Finding the Fourth Proportional to 87,721.47, 121,055.72 and 47,435.25

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Solution

The fourth proportional to 87,721.47, 121,055.72 and 47,435.25 is: 65,460.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,721.47 : 121,055.72 = 47,435.25 : x
  2. Step 2: Convert to fraction form
    87,721.47/121,055.72 = 47,435.25/x
  3. Step 3: Cross multiply
    87,721.47x = 121,055.72 × 47,435.25
  4. Step 4: Simplify right side
    87,721.47x = 5,742,308,104.95
  5. Step 5: Solve for x
    x = 5,742,308,104.95/87,721.47
  6. Step 6: Final answer
    x = 65,460.69

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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.