Home / 120,139.30-165,785.52-66,421.18

Finding the Fourth Proportional to 120,139.30, 165,785.52 and 66,421.18

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Solution

The fourth proportional to 120,139.30, 165,785.52 and 66,421.18 is: 91,657.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,139.30 : 165,785.52 = 66,421.18 : x
  2. Step 2: Convert to fraction form
    120,139.30/165,785.52 = 66,421.18/x
  3. Step 3: Cross multiply
    120,139.30x = 165,785.52 × 66,421.18
  4. Step 4: Simplify right side
    120,139.30x = 11,011,669,865.31
  5. Step 5: Solve for x
    x = 11,011,669,865.31/120,139.30
  6. Step 6: Final answer
    x = 91,657.52

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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.