Home / 138,788.40-191,528.64-75,126.24

Finding the Fourth Proportional to 138,788.40, 191,528.64 and 75,126.24

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Solution

The fourth proportional to 138,788.40, 191,528.64 and 75,126.24 is: 103,674.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,788.40 : 191,528.64 = 75,126.24 : x
  2. Step 2: Convert to fraction form
    138,788.40/191,528.64 = 75,126.24/x
  3. Step 3: Cross multiply
    138,788.40x = 191,528.64 × 75,126.24
  4. Step 4: Simplify right side
    138,788.40x = 14,388,826,575.51
  5. Step 5: Solve for x
    x = 14,388,826,575.51/138,788.40
  6. Step 6: Final answer
    x = 103,674.56

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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.