Home / 142,987.28-197,313-79,322.96

Finding the Fourth Proportional to 142,987.28, 197,313 and 79,322.96

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Solution

The fourth proportional to 142,987.28, 197,313 and 79,322.96 is: 109,460.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,987.28 : 197,313 = 79,322.96 : x
  2. Step 2: Convert to fraction form
    142,987.28/197,313 = 79,322.96/x
  3. Step 3: Cross multiply
    142,987.28x = 197,313 × 79,322.96
  4. Step 4: Simplify right side
    142,987.28x = 15,651,451,206.48
  5. Step 5: Solve for x
    x = 15,651,451,206.48/142,987.28
  6. Step 6: Final answer
    x = 109,460.44

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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.