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Finding the Fourth Proportional to 128,001.47, 191,980.94 and 39,231.14

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Solution

The fourth proportional to 128,001.47, 191,980.94 and 39,231.14 is: 58,840.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,001.47 : 191,980.94 = 39,231.14 : x
  2. Step 2: Convert to fraction form
    128,001.47/191,980.94 = 39,231.14/x
  3. Step 3: Cross multiply
    128,001.47x = 191,980.94 × 39,231.14
  4. Step 4: Simplify right side
    128,001.47x = 7,531,629,978.41
  5. Step 5: Solve for x
    x = 7,531,629,978.41/128,001.47
  6. Step 6: Final answer
    x = 58,840.19

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1.5x scale

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.