Home / 142,854.72-197,126.20-79,187.08

Finding the Fourth Proportional to 142,854.72, 197,126.20 and 79,187.08

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Solution

The fourth proportional to 142,854.72, 197,126.20 and 79,187.08 is: 109,270.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,854.72 : 197,126.20 = 79,187.08 : x
  2. Step 2: Convert to fraction form
    142,854.72/197,126.20 = 79,187.08/x
  3. Step 3: Cross multiply
    142,854.72x = 197,126.20 × 79,187.08
  4. Step 4: Simplify right side
    142,854.72x = 15,609,848,169.50
  5. Step 5: Solve for x
    x = 15,609,848,169.50/142,854.72
  6. Step 6: Final answer
    x = 109,270.79

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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.