Home / 141,422.40-195,148.80-81,007.20

Finding the Fourth Proportional to 141,422.40, 195,148.80 and 81,007.20

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Solution

The fourth proportional to 141,422.40, 195,148.80 and 81,007.20 is: 111,781.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,422.40 : 195,148.80 = 81,007.20 : x
  2. Step 2: Convert to fraction form
    141,422.40/195,148.80 = 81,007.20/x
  3. Step 3: Cross multiply
    141,422.40x = 195,148.80 × 81,007.20
  4. Step 4: Simplify right side
    141,422.40x = 15,808,457,871.36
  5. Step 5: Solve for x
    x = 15,808,457,871.36/141,422.40
  6. Step 6: Final answer
    x = 111,781.85

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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.