Home / 138,799.19-191,528.64-80,646.86

Finding the Fourth Proportional to 138,799.19, 191,528.64 and 80,646.86

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Solution

The fourth proportional to 138,799.19, 191,528.64 and 80,646.86 is: 111,284.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,799.19 : 191,528.64 = 80,646.86 : x
  2. Step 2: Convert to fraction form
    138,799.19/191,528.64 = 80,646.86/x
  3. Step 3: Cross multiply
    138,799.19x = 191,528.64 × 80,646.86
  4. Step 4: Simplify right side
    138,799.19x = 15,446,182,458.43
  5. Step 5: Solve for x
    x = 15,446,182,458.43/138,799.19
  6. Step 6: Final answer
    x = 111,284.39

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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.