Home / 126,690.12-189,971.58-42,421.32

Finding the Fourth Proportional to 126,690.12, 189,971.58 and 42,421.32

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Solution

The fourth proportional to 126,690.12, 189,971.58 and 42,421.32 is: 63,610.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,690.12 : 189,971.58 = 42,421.32 : x
  2. Step 2: Convert to fraction form
    126,690.12/189,971.58 = 42,421.32/x
  3. Step 3: Cross multiply
    126,690.12x = 189,971.58 × 42,421.32
  4. Step 4: Simplify right side
    126,690.12x = 8,058,845,186.09
  5. Step 5: Solve for x
    x = 8,058,845,186.09/126,690.12
  6. Step 6: Final answer
    x = 63,610.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.