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Finding the Fourth Proportional to 128,615.80, 193,048.20 and 62,102.64

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Solution

The fourth proportional to 128,615.80, 193,048.20 and 62,102.64 is: 93,214.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,615.80 : 193,048.20 = 62,102.64 : x
  2. Step 2: Convert to fraction form
    128,615.80/193,048.20 = 62,102.64/x
  3. Step 3: Cross multiply
    128,615.80x = 193,048.20 × 62,102.64
  4. Step 4: Simplify right side
    128,615.80x = 11,988,802,867.25
  5. Step 5: Solve for x
    x = 11,988,802,867.25/128,615.80
  6. Step 6: Final answer
    x = 93,214.08

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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.