Home / 120,139.60-165,783.92-66,425.28

Finding the Fourth Proportional to 120,139.60, 165,783.92 and 66,425.28

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Solution

The fourth proportional to 120,139.60, 165,783.92 and 66,425.28 is: 91,662.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,139.60 : 165,783.92 = 66,425.28 : x
  2. Step 2: Convert to fraction form
    120,139.60/165,783.92 = 66,425.28/x
  3. Step 3: Cross multiply
    120,139.60x = 165,783.92 × 66,425.28
  4. Step 4: Simplify right side
    120,139.60x = 11,012,243,305.50
  5. Step 5: Solve for x
    x = 11,012,243,305.50/120,139.60
  6. Step 6: Final answer
    x = 91,662.06

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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.