Home / 87,720.06-121,053.58-47,433.72

Finding the Fourth Proportional to 87,720.06, 121,053.58 and 47,433.72

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Solution

The fourth proportional to 87,720.06, 121,053.58 and 47,433.72 is: 65,458.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,720.06 : 121,053.58 = 47,433.72 : x
  2. Step 2: Convert to fraction form
    87,720.06/121,053.58 = 47,433.72/x
  3. Step 3: Cross multiply
    87,720.06x = 121,053.58 × 47,433.72
  4. Step 4: Simplify right side
    87,720.06x = 5,742,021,618.72
  5. Step 5: Solve for x
    x = 5,742,021,618.72/87,720.06
  6. Step 6: Final answer
    x = 65,458.48

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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.