Home / 78,217.08-117,297-28,285.20

Finding the Fourth Proportional to 78,217.08, 117,297 and 28,285.20

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Solution

The fourth proportional to 78,217.08, 117,297 and 28,285.20 is: 42,417.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,217.08 : 117,297 = 28,285.20 : x
  2. Step 2: Convert to fraction form
    78,217.08/117,297 = 28,285.20/x
  3. Step 3: Cross multiply
    78,217.08x = 117,297 × 28,285.20
  4. Step 4: Simplify right side
    78,217.08x = 3,317,769,104.40
  5. Step 5: Solve for x
    x = 3,317,769,104.40/78,217.08
  6. Step 6: Final answer
    x = 42,417.45

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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.