Home / 105,539.36-145,639.50-63,121.28

Finding the Fourth Proportional to 105,539.36, 145,639.50 and 63,121.28

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Solution

The fourth proportional to 105,539.36, 145,639.50 and 63,121.28 is: 87,104.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,539.36 : 145,639.50 = 63,121.28 : x
  2. Step 2: Convert to fraction form
    105,539.36/145,639.50 = 63,121.28/x
  3. Step 3: Cross multiply
    105,539.36x = 145,639.50 × 63,121.28
  4. Step 4: Simplify right side
    105,539.36x = 9,192,951,658.56
  5. Step 5: Solve for x
    x = 9,192,951,658.56/105,539.36
  6. Step 6: Final answer
    x = 87,104.49

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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.