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Finding the Fourth Proportional to 207,099.36, 310,681.80 and 66,825.18

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Solution

The fourth proportional to 207,099.36, 310,681.80 and 66,825.18 is: 100,248.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,099.36 : 310,681.80 = 66,825.18 : x
  2. Step 2: Convert to fraction form
    207,099.36/310,681.80 = 66,825.18/x
  3. Step 3: Cross multiply
    207,099.36x = 310,681.80 × 66,825.18
  4. Step 4: Simplify right side
    207,099.36x = 20,761,367,207.72
  5. Step 5: Solve for x
    x = 20,761,367,207.72/207,099.36
  6. Step 6: Final answer
    x = 100,248.34

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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.