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Finding the Fourth Proportional to 165,421.40, 248,060.10 and 76,645.40

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Solution

The fourth proportional to 165,421.40, 248,060.10 and 76,645.40 is: 114,934.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,421.40 : 248,060.10 = 76,645.40 : x
  2. Step 2: Convert to fraction form
    165,421.40/248,060.10 = 76,645.40/x
  3. Step 3: Cross multiply
    165,421.40x = 248,060.10 × 76,645.40
  4. Step 4: Simplify right side
    165,421.40x = 19,012,665,588.54
  5. Step 5: Solve for x
    x = 19,012,665,588.54/165,421.40
  6. Step 6: Final answer
    x = 114,934.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.