Home / 126,078.40-188,996.10-72,715.60

Finding the Fourth Proportional to 126,078.40, 188,996.10 and 72,715.60

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Solution

The fourth proportional to 126,078.40, 188,996.10 and 72,715.60 is: 109,003.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,078.40 : 188,996.10 = 72,715.60 : x
  2. Step 2: Convert to fraction form
    126,078.40/188,996.10 = 72,715.60/x
  3. Step 3: Cross multiply
    126,078.40x = 188,996.10 × 72,715.60
  4. Step 4: Simplify right side
    126,078.40x = 13,742,964,809.16
  5. Step 5: Solve for x
    x = 13,742,964,809.16/126,078.40
  6. Step 6: Final answer
    x = 109,003.32

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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.