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Finding the Fourth Proportional to 101,407.90, 151,978.73 and 74,628.49

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Solution

The fourth proportional to 101,407.90, 151,978.73 and 74,628.49 is: 111,844.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,407.90 : 151,978.73 = 74,628.49 : x
  2. Step 2: Convert to fraction form
    101,407.90/151,978.73 = 74,628.49/x
  3. Step 3: Cross multiply
    101,407.90x = 151,978.73 × 74,628.49
  4. Step 4: Simplify right side
    101,407.90x = 11,341,943,083.67
  5. Step 5: Solve for x
    x = 11,341,943,083.67/101,407.90
  6. Step 6: Final answer
    x = 111,844.77

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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.