Home / 105,428.20-158,142.30-69,998.80

Finding the Fourth Proportional to 105,428.20, 158,142.30 and 69,998.80

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Solution

The fourth proportional to 105,428.20, 158,142.30 and 69,998.80 is: 104,998.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,428.20 : 158,142.30 = 69,998.80 : x
  2. Step 2: Convert to fraction form
    105,428.20/158,142.30 = 69,998.80/x
  3. Step 3: Cross multiply
    105,428.20x = 158,142.30 × 69,998.80
  4. Step 4: Simplify right side
    105,428.20x = 11,069,771,229.24
  5. Step 5: Solve for x
    x = 11,069,771,229.24/105,428.20
  6. Step 6: Final answer
    x = 104,998.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.