Home / 126,106.79-189,215.90-66,120.93

Finding the Fourth Proportional to 126,106.79, 189,215.90 and 66,120.93

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Solution

The fourth proportional to 126,106.79, 189,215.90 and 66,120.93 is: 99,210.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,106.79 : 189,215.90 = 66,120.93 : x
  2. Step 2: Convert to fraction form
    126,106.79/189,215.90 = 66,120.93/x
  3. Step 3: Cross multiply
    126,106.79x = 189,215.90 × 66,120.93
  4. Step 4: Simplify right side
    126,106.79x = 12,511,130,948.18
  5. Step 5: Solve for x
    x = 12,511,130,948.18/126,106.79
  6. Step 6: Final answer
    x = 99,210.61

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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.