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Finding the Fourth Proportional to 78,911.55, 118,383.89 and 22,751.55

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Solution

The fourth proportional to 78,911.55, 118,383.89 and 22,751.55 is: 34,132.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,911.55 : 118,383.89 = 22,751.55 : x
  2. Step 2: Convert to fraction form
    78,911.55/118,383.89 = 22,751.55/x
  3. Step 3: Cross multiply
    78,911.55x = 118,383.89 × 22,751.55
  4. Step 4: Simplify right side
    78,911.55x = 2,693,416,878.77
  5. Step 5: Solve for x
    x = 2,693,416,878.77/78,911.55
  6. Step 6: Final answer
    x = 34,132.10

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1.5x scale

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.