Home / 78,911.90-118,383.62-28,297.40

Finding the Fourth Proportional to 78,911.90, 118,383.62 and 28,297.40

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Solution

The fourth proportional to 78,911.90, 118,383.62 and 28,297.40 is: 42,451.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,911.90 : 118,383.62 = 28,297.40 : x
  2. Step 2: Convert to fraction form
    78,911.90/118,383.62 = 28,297.40/x
  3. Step 3: Cross multiply
    78,911.90x = 118,383.62 × 28,297.40
  4. Step 4: Simplify right side
    78,911.90x = 3,349,948,648.59
  5. Step 5: Solve for x
    x = 3,349,948,648.59/78,911.90
  6. Step 6: Final answer
    x = 42,451.76

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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.