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Finding the Fourth Proportional to 119,620.71, 165,076.74 and 65,172.60

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Solution

The fourth proportional to 119,620.71, 165,076.74 and 65,172.60 is: 89,938.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,620.71 : 165,076.74 = 65,172.60 : x
  2. Step 2: Convert to fraction form
    119,620.71/165,076.74 = 65,172.60/x
  3. Step 3: Cross multiply
    119,620.71x = 165,076.74 × 65,172.60
  4. Step 4: Simplify right side
    119,620.71x = 10,758,480,345.32
  5. Step 5: Solve for x
    x = 10,758,480,345.32/119,620.71
  6. Step 6: Final answer
    x = 89,938.28

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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.