Home / 105,396.45-145,406.25-67,149.16

Finding the Fourth Proportional to 105,396.45, 145,406.25 and 67,149.16

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Solution

The fourth proportional to 105,396.45, 145,406.25 and 67,149.16 is: 92,639.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,396.45 : 145,406.25 = 67,149.16 : x
  2. Step 2: Convert to fraction form
    105,396.45/145,406.25 = 67,149.16/x
  3. Step 3: Cross multiply
    105,396.45x = 145,406.25 × 67,149.16
  4. Step 4: Simplify right side
    105,396.45x = 9,763,906,954.47
  5. Step 5: Solve for x
    x = 9,763,906,954.47/105,396.45
  6. Step 6: Final answer
    x = 92,639.81

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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.