Home / 420,789.76-631,184.70-105,246.68

Finding the Fourth Proportional to 420,789.76, 631,184.70 and 105,246.68

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Solution

The fourth proportional to 420,789.76, 631,184.70 and 105,246.68 is: 157,870.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,789.76 : 631,184.70 = 105,246.68 : x
  2. Step 2: Convert to fraction form
    420,789.76/631,184.70 = 105,246.68/x
  3. Step 3: Cross multiply
    420,789.76x = 631,184.70 × 105,246.68
  4. Step 4: Simplify right side
    420,789.76x = 66,430,094,141.80
  5. Step 5: Solve for x
    x = 66,430,094,141.80/420,789.76
  6. Step 6: Final answer
    x = 157,870.04

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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.