Home / 100,329.18-138,454.67-55,007.86

Finding the Fourth Proportional to 100,329.18, 138,454.67 and 55,007.86

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Solution

The fourth proportional to 100,329.18, 138,454.67 and 55,007.86 is: 75,911.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,329.18 : 138,454.67 = 55,007.86 : x
  2. Step 2: Convert to fraction form
    100,329.18/138,454.67 = 55,007.86/x
  3. Step 3: Cross multiply
    100,329.18x = 138,454.67 × 55,007.86
  4. Step 4: Simplify right side
    100,329.18x = 7,616,094,845.27
  5. Step 5: Solve for x
    x = 7,616,094,845.27/100,329.18
  6. Step 6: Final answer
    x = 75,911.06

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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.