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Finding the Fourth Proportional to 128,739.75, 193,151.54 and 62,187.51

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Solution

The fourth proportional to 128,739.75, 193,151.54 and 62,187.51 is: 93,301.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,739.75 : 193,151.54 = 62,187.51 : x
  2. Step 2: Convert to fraction form
    128,739.75/193,151.54 = 62,187.51/x
  3. Step 3: Cross multiply
    128,739.75x = 193,151.54 × 62,187.51
  4. Step 4: Simplify right side
    128,739.75x = 12,011,613,855.25
  5. Step 5: Solve for x
    x = 12,011,613,855.25/128,739.75
  6. Step 6: Final answer
    x = 93,301.52

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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.