Home / 130,689.28-195,945.21-66,489.64

Finding the Fourth Proportional to 130,689.28, 195,945.21 and 66,489.64

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Solution

The fourth proportional to 130,689.28, 195,945.21 and 66,489.64 is: 99,689.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,689.28 : 195,945.21 = 66,489.64 : x
  2. Step 2: Convert to fraction form
    130,689.28/195,945.21 = 66,489.64/x
  3. Step 3: Cross multiply
    130,689.28x = 195,945.21 × 66,489.64
  4. Step 4: Simplify right side
    130,689.28x = 13,028,326,472.62
  5. Step 5: Solve for x
    x = 13,028,326,472.62/130,689.28
  6. Step 6: Final answer
    x = 99,689.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.