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Finding the Fourth Proportional to 120,018.32, 165,622.08 and 66,294.66

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Solution

The fourth proportional to 120,018.32, 165,622.08 and 66,294.66 is: 91,484.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,018.32 : 165,622.08 = 66,294.66 : x
  2. Step 2: Convert to fraction form
    120,018.32/165,622.08 = 66,294.66/x
  3. Step 3: Cross multiply
    120,018.32x = 165,622.08 × 66,294.66
  4. Step 4: Simplify right side
    120,018.32x = 10,979,859,482.09
  5. Step 5: Solve for x
    x = 10,979,859,482.09/120,018.32
  6. Step 6: Final answer
    x = 91,484.86

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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.