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Finding the Fourth Proportional to 112,989.36, 155,923.92 and 65,241.66

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Solution

The fourth proportional to 112,989.36, 155,923.92 and 65,241.66 is: 90,032.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,989.36 : 155,923.92 = 65,241.66 : x
  2. Step 2: Convert to fraction form
    112,989.36/155,923.92 = 65,241.66/x
  3. Step 3: Cross multiply
    112,989.36x = 155,923.92 × 65,241.66
  4. Step 4: Simplify right side
    112,989.36x = 10,172,735,374.51
  5. Step 5: Solve for x
    x = 10,172,735,374.51/112,989.36
  6. Step 6: Final answer
    x = 90,032.68

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1.5x scale

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.