Home / 127,815.40-191,723.10-71,828.20

Finding the Fourth Proportional to 127,815.40, 191,723.10 and 71,828.20

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Solution

The fourth proportional to 127,815.40, 191,723.10 and 71,828.20 is: 107,742.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,815.40 : 191,723.10 = 71,828.20 : x
  2. Step 2: Convert to fraction form
    127,815.40/191,723.10 = 71,828.20/x
  3. Step 3: Cross multiply
    127,815.40x = 191,723.10 × 71,828.20
  4. Step 4: Simplify right side
    127,815.40x = 13,771,125,171.42
  5. Step 5: Solve for x
    x = 13,771,125,171.42/127,815.40
  6. Step 6: Final answer
    x = 107,742.30

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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.