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Finding the Fourth Proportional to 119,866.24, 165,419.39 and 65,421.39

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Solution

The fourth proportional to 119,866.24, 165,419.39 and 65,421.39 is: 90,283.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,866.24 : 165,419.39 = 65,421.39 : x
  2. Step 2: Convert to fraction form
    119,866.24/165,419.39 = 65,421.39/x
  3. Step 3: Cross multiply
    119,866.24x = 165,419.39 × 65,421.39
  4. Step 4: Simplify right side
    119,866.24x = 10,821,966,426.75
  5. Step 5: Solve for x
    x = 10,821,966,426.75/119,866.24
  6. Step 6: Final answer
    x = 90,283.69

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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.