Home / 207,200.40-310,722.48-66,921.36

Finding the Fourth Proportional to 207,200.40, 310,722.48 and 66,921.36

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Solution

The fourth proportional to 207,200.40, 310,722.48 and 66,921.36 is: 100,356.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,200.40 : 310,722.48 = 66,921.36 : x
  2. Step 2: Convert to fraction form
    207,200.40/310,722.48 = 66,921.36/x
  3. Step 3: Cross multiply
    207,200.40x = 310,722.48 × 66,921.36
  4. Step 4: Simplify right side
    207,200.40x = 20,793,970,944.17
  5. Step 5: Solve for x
    x = 20,793,970,944.17/207,200.40
  6. Step 6: Final answer
    x = 100,356.81

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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.