Home / 142,770.78-197,018.12-81,520.00

Finding the Fourth Proportional to 142,770.78, 197,018.12 and 81,520.00

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Solution

The fourth proportional to 142,770.78, 197,018.12 and 81,520.00 is: 112,494.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,770.78 : 197,018.12 = 81,520.00 : x
  2. Step 2: Convert to fraction form
    142,770.78/197,018.12 = 81,520.00/x
  3. Step 3: Cross multiply
    142,770.78x = 197,018.12 × 81,520.00
  4. Step 4: Simplify right side
    142,770.78x = 16,060,916,407.05
  5. Step 5: Solve for x
    x = 16,060,916,407.05/142,770.78
  6. Step 6: Final answer
    x = 112,494.42

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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.