Home / 78,799.87-108,742.80-42,989.12

Finding the Fourth Proportional to 78,799.87, 108,742.80 and 42,989.12

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Solution

The fourth proportional to 78,799.87, 108,742.80 and 42,989.12 is: 59,324.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,799.87 : 108,742.80 = 42,989.12 : x
  2. Step 2: Convert to fraction form
    78,799.87/108,742.80 = 42,989.12/x
  3. Step 3: Cross multiply
    78,799.87x = 108,742.80 × 42,989.12
  4. Step 4: Simplify right side
    78,799.87x = 4,674,757,278.34
  5. Step 5: Solve for x
    x = 4,674,757,278.34/78,799.87
  6. Step 6: Final answer
    x = 59,324.43

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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.