Home / 420,784.74-631,177.20-105,241.68

Finding the Fourth Proportional to 420,784.74, 631,177.20 and 105,241.68

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Solution

The fourth proportional to 420,784.74, 631,177.20 and 105,241.68 is: 157,862.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,784.74 : 631,177.20 = 105,241.68 : x
  2. Step 2: Convert to fraction form
    420,784.74/631,177.20 = 105,241.68/x
  3. Step 3: Cross multiply
    420,784.74x = 631,177.20 × 105,241.68
  4. Step 4: Simplify right side
    420,784.74x = 66,426,148,905.70
  5. Step 5: Solve for x
    x = 66,426,148,905.70/420,784.74
  6. Step 6: Final answer
    x = 157,862.54

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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.