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Finding the Fourth Proportional to 78,780.83, 118,115.88 and 28,854.44

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Solution

The fourth proportional to 78,780.83, 118,115.88 and 28,854.44 is: 43,261.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,780.83 : 118,115.88 = 28,854.44 : x
  2. Step 2: Convert to fraction form
    78,780.83/118,115.88 = 28,854.44/x
  3. Step 3: Cross multiply
    78,780.83x = 118,115.88 × 28,854.44
  4. Step 4: Simplify right side
    78,780.83x = 3,408,167,572.51
  5. Step 5: Solve for x
    x = 3,408,167,572.51/78,780.83
  6. Step 6: Final answer
    x = 43,261.38

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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.