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Finding the Fourth Proportional to 120,038.92, 165,649.26 and 66,322.78

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Solution

The fourth proportional to 120,038.92, 165,649.26 and 66,322.78 is: 91,522.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,038.92 : 165,649.26 = 66,322.78 : x
  2. Step 2: Convert to fraction form
    120,038.92/165,649.26 = 66,322.78/x
  3. Step 3: Cross multiply
    120,038.92x = 165,649.26 × 66,322.78
  4. Step 4: Simplify right side
    120,038.92x = 10,986,319,428.14
  5. Step 5: Solve for x
    x = 10,986,319,428.14/120,038.92
  6. Step 6: Final answer
    x = 91,522.98

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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.