Home / 72,258.26-99,716.40-40,434.64

Finding the Fourth Proportional to 72,258.26, 99,716.40 and 40,434.64

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Solution

The fourth proportional to 72,258.26, 99,716.40 and 40,434.64 is: 55,799.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,258.26 : 99,716.40 = 40,434.64 : x
  2. Step 2: Convert to fraction form
    72,258.26/99,716.40 = 40,434.64/x
  3. Step 3: Cross multiply
    72,258.26x = 99,716.40 × 40,434.64
  4. Step 4: Simplify right side
    72,258.26x = 4,031,996,736.10
  5. Step 5: Solve for x
    x = 4,031,996,736.10/72,258.26
  6. Step 6: Final answer
    x = 55,799.80

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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.