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Finding the Fourth Proportional to 120,038.80, 165,639.24 and 66,320.56

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Solution

The fourth proportional to 120,038.80, 165,639.24 and 66,320.56 is: 91,514.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,038.80 : 165,639.24 = 66,320.56 : x
  2. Step 2: Convert to fraction form
    120,038.80/165,639.24 = 66,320.56/x
  3. Step 3: Cross multiply
    120,038.80x = 165,639.24 × 66,320.56
  4. Step 4: Simplify right side
    120,038.80x = 10,985,287,154.77
  5. Step 5: Solve for x
    x = 10,985,287,154.77/120,038.80
  6. Step 6: Final answer
    x = 91,514.47

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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.