Home / 126,689.12-189,970.08-42,420.32

Finding the Fourth Proportional to 126,689.12, 189,970.08 and 42,420.32

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Solution

The fourth proportional to 126,689.12, 189,970.08 and 42,420.32 is: 63,609.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,689.12 : 189,970.08 = 42,420.32 : x
  2. Step 2: Convert to fraction form
    126,689.12/189,970.08 = 42,420.32/x
  3. Step 3: Cross multiply
    126,689.12x = 189,970.08 × 42,420.32
  4. Step 4: Simplify right side
    126,689.12x = 8,058,591,584.03
  5. Step 5: Solve for x
    x = 8,058,591,584.03/126,689.12
  6. Step 6: Final answer
    x = 63,609.18

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1.5x scale

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.