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Finding the Fourth Proportional to 78,607.48, 108,480.26 and 42,799.44

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Solution

The fourth proportional to 78,607.48, 108,480.26 and 42,799.44 is: 59,064.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,607.48 : 108,480.26 = 42,799.44 : x
  2. Step 2: Convert to fraction form
    78,607.48/108,480.26 = 42,799.44/x
  3. Step 3: Cross multiply
    78,607.48x = 108,480.26 × 42,799.44
  4. Step 4: Simplify right side
    78,607.48x = 4,642,894,379.05
  5. Step 5: Solve for x
    x = 4,642,894,379.05/78,607.48
  6. Step 6: Final answer
    x = 59,064.28

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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.