Home / 318,705.04-478,057.60-105,415.68

Finding the Fourth Proportional to 318,705.04, 478,057.60 and 105,415.68

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Solution

The fourth proportional to 318,705.04, 478,057.60 and 105,415.68 is: 158,123.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,705.04 : 478,057.60 = 105,415.68 : x
  2. Step 2: Convert to fraction form
    318,705.04/478,057.60 = 105,415.68/x
  3. Step 3: Cross multiply
    318,705.04x = 478,057.60 × 105,415.68
  4. Step 4: Simplify right side
    318,705.04x = 50,394,766,983.17
  5. Step 5: Solve for x
    x = 50,394,766,983.17/318,705.04
  6. Step 6: Final answer
    x = 158,123.53

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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.