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Finding the Fourth Proportional to 119,875.70, 165,428.81 and 65,428.37

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Solution

The fourth proportional to 119,875.70, 165,428.81 and 65,428.37 is: 90,291.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,875.70 : 165,428.81 = 65,428.37 : x
  2. Step 2: Convert to fraction form
    119,875.70/165,428.81 = 65,428.37/x
  3. Step 3: Cross multiply
    119,875.70x = 165,428.81 × 65,428.37
  4. Step 4: Simplify right side
    119,875.70x = 10,823,736,235.05
  5. Step 5: Solve for x
    x = 10,823,736,235.05/119,875.70
  6. Step 6: Final answer
    x = 90,291.33

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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.