Home / 278,583.80-417,878.10-78,908.60

Finding the Fourth Proportional to 278,583.80, 417,878.10 and 78,908.60

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Solution

The fourth proportional to 278,583.80, 417,878.10 and 78,908.60 is: 118,363.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,583.80 : 417,878.10 = 78,908.60 : x
  2. Step 2: Convert to fraction form
    278,583.80/417,878.10 = 78,908.60/x
  3. Step 3: Cross multiply
    278,583.80x = 417,878.10 × 78,908.60
  4. Step 4: Simplify right side
    278,583.80x = 32,974,175,841.66
  5. Step 5: Solve for x
    x = 32,974,175,841.66/278,583.80
  6. Step 6: Final answer
    x = 118,363.58

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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.