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Finding the Fourth Proportional to 207,029.66, 310,508.47 and 66,788.28

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Solution

The fourth proportional to 207,029.66, 310,508.47 and 66,788.28 is: 100,170.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,029.66 : 310,508.47 = 66,788.28 : x
  2. Step 2: Convert to fraction form
    207,029.66/310,508.47 = 66,788.28/x
  3. Step 3: Cross multiply
    207,029.66x = 310,508.47 × 66,788.28
  4. Step 4: Simplify right side
    207,029.66x = 20,738,327,079.06
  5. Step 5: Solve for x
    x = 20,738,327,079.06/207,029.66
  6. Step 6: Final answer
    x = 100,170.80

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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.