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Finding the Fourth Proportional to 120,151.68, 165,810.36 and 66,437.64

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Solution

The fourth proportional to 120,151.68, 165,810.36 and 66,437.64 is: 91,684.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,151.68 : 165,810.36 = 66,437.64 : x
  2. Step 2: Convert to fraction form
    120,151.68/165,810.36 = 66,437.64/x
  3. Step 3: Cross multiply
    120,151.68x = 165,810.36 × 66,437.64
  4. Step 4: Simplify right side
    120,151.68x = 11,016,049,005.95
  5. Step 5: Solve for x
    x = 11,016,049,005.95/120,151.68
  6. Step 6: Final answer
    x = 91,684.52

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1.5x scale

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.