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Finding the Fourth Proportional to 112,790.99, 155,641.21 and 65,035.11

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Solution

The fourth proportional to 112,790.99, 155,641.21 and 65,035.11 is: 89,742.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,790.99 : 155,641.21 = 65,035.11 : x
  2. Step 2: Convert to fraction form
    112,790.99/155,641.21 = 65,035.11/x
  3. Step 3: Cross multiply
    112,790.99x = 155,641.21 × 65,035.11
  4. Step 4: Simplify right side
    112,790.99x = 10,122,143,212.88
  5. Step 5: Solve for x
    x = 10,122,143,212.88/112,790.99
  6. Step 6: Final answer
    x = 89,742.48

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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.