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Finding the Fourth Proportional to 119,978.52, 165,567.14 and 66,259.72

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Solution

The fourth proportional to 119,978.52, 165,567.14 and 66,259.72 is: 91,436.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,978.52 : 165,567.14 = 66,259.72 : x
  2. Step 2: Convert to fraction form
    119,978.52/165,567.14 = 66,259.72/x
  3. Step 3: Cross multiply
    119,978.52x = 165,567.14 × 66,259.72
  4. Step 4: Simplify right side
    119,978.52x = 10,970,432,461.74
  5. Step 5: Solve for x
    x = 10,970,432,461.74/119,978.52
  6. Step 6: Final answer
    x = 91,436.64

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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.