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Finding the Fourth Proportional to 78,854.76, 108,858.60 and 48,656.72

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Solution

The fourth proportional to 78,854.76, 108,858.60 and 48,656.72 is: 67,170.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,854.76 : 108,858.60 = 48,656.72 : x
  2. Step 2: Convert to fraction form
    78,854.76/108,858.60 = 48,656.72/x
  3. Step 3: Cross multiply
    78,854.76x = 108,858.60 × 48,656.72
  4. Step 4: Simplify right side
    78,854.76x = 5,296,702,691.94
  5. Step 5: Solve for x
    x = 5,296,702,691.94/78,854.76
  6. Step 6: Final answer
    x = 67,170.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.