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Finding the Fourth Proportional to 101,881, 140,608.74 and 57,169

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Solution

The fourth proportional to 101,881, 140,608.74 and 57,169 is: 78,900.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,881 : 140,608.74 = 57,169 : x
  2. Step 2: Convert to fraction form
    101,881/140,608.74 = 57,169/x
  3. Step 3: Cross multiply
    101,881x = 140,608.74 × 57,169
  4. Step 4: Simplify right side
    101,881x = 8,038,461,057.06
  5. Step 5: Solve for x
    x = 8,038,461,057.06/101,881
  6. Step 6: Final answer
    x = 78,900.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.