Home / 120,128.64-165,780.98-66,417.11

Finding the Fourth Proportional to 120,128.64, 165,780.98 and 66,417.11

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Solution

The fourth proportional to 120,128.64, 165,780.98 and 66,417.11 is: 91,657.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,128.64 : 165,780.98 = 66,417.11 : x
  2. Step 2: Convert to fraction form
    120,128.64/165,780.98 = 66,417.11/x
  3. Step 3: Cross multiply
    120,128.64x = 165,780.98 × 66,417.11
  4. Step 4: Simplify right side
    120,128.64x = 11,010,694,226.84
  5. Step 5: Solve for x
    x = 11,010,694,226.84/120,128.64
  6. Step 6: Final answer
    x = 91,657.53

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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.