Home / 100,366.86-138,466.75-57,917.19

Finding the Fourth Proportional to 100,366.86, 138,466.75 and 57,917.19

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Solution

The fourth proportional to 100,366.86, 138,466.75 and 57,917.19 is: 79,902.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,366.86 : 138,466.75 = 57,917.19 : x
  2. Step 2: Convert to fraction form
    100,366.86/138,466.75 = 57,917.19/x
  3. Step 3: Cross multiply
    100,366.86x = 138,466.75 × 57,917.19
  4. Step 4: Simplify right side
    100,366.86x = 8,019,605,068.43
  5. Step 5: Solve for x
    x = 8,019,605,068.43/100,366.86
  6. Step 6: Final answer
    x = 79,902.92

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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.