Home / 105,815.20-158,722.80-82,459.12

Finding the Fourth Proportional to 105,815.20, 158,722.80 and 82,459.12

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Solution

The fourth proportional to 105,815.20, 158,722.80 and 82,459.12 is: 123,688.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,815.20 : 158,722.80 = 82,459.12 : x
  2. Step 2: Convert to fraction form
    105,815.20/158,722.80 = 82,459.12/x
  3. Step 3: Cross multiply
    105,815.20x = 158,722.80 × 82,459.12
  4. Step 4: Simplify right side
    105,815.20x = 13,088,142,411.94
  5. Step 5: Solve for x
    x = 13,088,142,411.94/105,815.20
  6. Step 6: Final answer
    x = 123,688.68

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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.