Home / 105,764.28-145,961.40-69,891.36

Finding the Fourth Proportional to 105,764.28, 145,961.40 and 69,891.36

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Solution

The fourth proportional to 105,764.28, 145,961.40 and 69,891.36 is: 96,454.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,764.28 : 145,961.40 = 69,891.36 : x
  2. Step 2: Convert to fraction form
    105,764.28/145,961.40 = 69,891.36/x
  3. Step 3: Cross multiply
    105,764.28x = 145,961.40 × 69,891.36
  4. Step 4: Simplify right side
    105,764.28x = 10,201,440,753.50
  5. Step 5: Solve for x
    x = 10,201,440,753.50/105,764.28
  6. Step 6: Final answer
    x = 96,454.50

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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.