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Finding the Fourth Proportional to 115,502.90, 159,396.63 and 67,790.66

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Solution

The fourth proportional to 115,502.90, 159,396.63 and 67,790.66 is: 93,552.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,502.90 : 159,396.63 = 67,790.66 : x
  2. Step 2: Convert to fraction form
    115,502.90/159,396.63 = 67,790.66/x
  3. Step 3: Cross multiply
    115,502.90x = 159,396.63 × 67,790.66
  4. Step 4: Simplify right side
    115,502.90x = 10,805,602,749.48
  5. Step 5: Solve for x
    x = 10,805,602,749.48/115,502.90
  6. Step 6: Final answer
    x = 93,552.65

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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.