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Finding the Fourth Proportional to 62,139.51, 93,142.20 and 30,512.79

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Solution

The fourth proportional to 62,139.51, 93,142.20 and 30,512.79 is: 45,736.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,139.51 : 93,142.20 = 30,512.79 : x
  2. Step 2: Convert to fraction form
    62,139.51/93,142.20 = 30,512.79/x
  3. Step 3: Cross multiply
    62,139.51x = 93,142.20 × 30,512.79
  4. Step 4: Simplify right side
    62,139.51x = 2,842,028,388.74
  5. Step 5: Solve for x
    x = 2,842,028,388.74/62,139.51
  6. Step 6: Final answer
    x = 45,736.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.