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Finding the Fourth Proportional to 62,987.36, 86,921.52 and 34,695.68

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Solution

The fourth proportional to 62,987.36, 86,921.52 and 34,695.68 is: 47,879.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,987.36 : 86,921.52 = 34,695.68 : x
  2. Step 2: Convert to fraction form
    62,987.36/86,921.52 = 34,695.68/x
  3. Step 3: Cross multiply
    62,987.36x = 86,921.52 × 34,695.68
  4. Step 4: Simplify right side
    62,987.36x = 3,015,801,243.03
  5. Step 5: Solve for x
    x = 3,015,801,243.03/62,987.36
  6. Step 6: Final answer
    x = 47,879.47

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1.5x scale

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.