Home / 100,969.10-139,336.71-55,647.13

Finding the Fourth Proportional to 100,969.10, 139,336.71 and 55,647.13

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Solution

The fourth proportional to 100,969.10, 139,336.71 and 55,647.13 is: 76,792.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,969.10 : 139,336.71 = 55,647.13 : x
  2. Step 2: Convert to fraction form
    100,969.10/139,336.71 = 55,647.13/x
  3. Step 3: Cross multiply
    100,969.10x = 139,336.71 × 55,647.13
  4. Step 4: Simplify right side
    100,969.10x = 7,753,687,318.46
  5. Step 5: Solve for x
    x = 7,753,687,318.46/100,969.10
  6. Step 6: Final answer
    x = 76,792.68

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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.