Home / 78,716.12-108,625.05-42,905.36

Finding the Fourth Proportional to 78,716.12, 108,625.05 and 42,905.36

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Solution

The fourth proportional to 78,716.12, 108,625.05 and 42,905.36 is: 59,207.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,716.12 : 108,625.05 = 42,905.36 : x
  2. Step 2: Convert to fraction form
    78,716.12/108,625.05 = 42,905.36/x
  3. Step 3: Cross multiply
    78,716.12x = 108,625.05 × 42,905.36
  4. Step 4: Simplify right side
    78,716.12x = 4,660,596,875.27
  5. Step 5: Solve for x
    x = 4,660,596,875.27/78,716.12
  6. Step 6: Final answer
    x = 59,207.65

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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.