Home / 100,305.93-138,426.71-57,289.17

Finding the Fourth Proportional to 100,305.93, 138,426.71 and 57,289.17

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Solution

The fourth proportional to 100,305.93, 138,426.71 and 57,289.17 is: 79,061.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,305.93 : 138,426.71 = 57,289.17 : x
  2. Step 2: Convert to fraction form
    100,305.93/138,426.71 = 57,289.17/x
  3. Step 3: Cross multiply
    100,305.93x = 138,426.71 × 57,289.17
  4. Step 4: Simplify right side
    100,305.93x = 7,930,351,035.28
  5. Step 5: Solve for x
    x = 7,930,351,035.28/100,305.93
  6. Step 6: Final answer
    x = 79,061.64

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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.