Home / 142,393.20-196,511.88-81,971.28

Finding the Fourth Proportional to 142,393.20, 196,511.88 and 81,971.28

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Solution

The fourth proportional to 142,393.20, 196,511.88 and 81,971.28 is: 113,125.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,393.20 : 196,511.88 = 81,971.28 : x
  2. Step 2: Convert to fraction form
    142,393.20/196,511.88 = 81,971.28/x
  3. Step 3: Cross multiply
    142,393.20x = 196,511.88 × 81,971.28
  4. Step 4: Simplify right side
    142,393.20x = 16,108,330,338.81
  5. Step 5: Solve for x
    x = 16,108,330,338.81/142,393.20
  6. Step 6: Final answer
    x = 113,125.70

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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.