Home / 100,406.18-138,559.23-57,385.28

Finding the Fourth Proportional to 100,406.18, 138,559.23 and 57,385.28

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Solution

The fourth proportional to 100,406.18, 138,559.23 and 57,385.28 is: 79,190.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,406.18 : 138,559.23 = 57,385.28 : x
  2. Step 2: Convert to fraction form
    100,406.18/138,559.23 = 57,385.28/x
  3. Step 3: Cross multiply
    100,406.18x = 138,559.23 × 57,385.28
  4. Step 4: Simplify right side
    100,406.18x = 7,951,260,210.13
  5. Step 5: Solve for x
    x = 7,951,260,210.13/100,406.18
  6. Step 6: Final answer
    x = 79,190.94

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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.