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Finding the Fourth Proportional to 121,795.74, 168,105.24 and 74,038.98

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Solution

The fourth proportional to 121,795.74, 168,105.24 and 74,038.98 is: 102,190.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,795.74 : 168,105.24 = 74,038.98 : x
  2. Step 2: Convert to fraction form
    121,795.74/168,105.24 = 74,038.98/x
  3. Step 3: Cross multiply
    121,795.74x = 168,105.24 × 74,038.98
  4. Step 4: Simplify right side
    121,795.74x = 12,446,340,502.26
  5. Step 5: Solve for x
    x = 12,446,340,502.26/121,795.74
  6. Step 6: Final answer
    x = 102,190.28

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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.