Home / 142,839.10-197,051.70-100,422.64

Finding the Fourth Proportional to 142,839.10, 197,051.70 and 100,422.64

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Solution

The fourth proportional to 142,839.10, 197,051.70 and 100,422.64 is: 138,536.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,839.10 : 197,051.70 = 100,422.64 : x
  2. Step 2: Convert to fraction form
    142,839.10/197,051.70 = 100,422.64/x
  3. Step 3: Cross multiply
    142,839.10x = 197,051.70 × 100,422.64
  4. Step 4: Simplify right side
    142,839.10x = 19,788,451,930.49
  5. Step 5: Solve for x
    x = 19,788,451,930.49/142,839.10
  6. Step 6: Final answer
    x = 138,536.66

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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.