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Finding the Fourth Proportional to 119,889.71, 165,451.81 and 65,445.11

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Solution

The fourth proportional to 119,889.71, 165,451.81 and 65,445.11 is: 90,316.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,889.71 : 165,451.81 = 65,445.11 : x
  2. Step 2: Convert to fraction form
    119,889.71/165,451.81 = 65,445.11/x
  3. Step 3: Cross multiply
    119,889.71x = 165,451.81 × 65,445.11
  4. Step 4: Simplify right side
    119,889.71x = 10,828,012,400.59
  5. Step 5: Solve for x
    x = 10,828,012,400.59/119,889.71
  6. Step 6: Final answer
    x = 90,316.44

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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.