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Finding the Fourth Proportional to 207,886.17, 312,004.51 and 81,615.09

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Solution

The fourth proportional to 207,886.17, 312,004.51 and 81,615.09 is: 122,491.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,886.17 : 312,004.51 = 81,615.09 : x
  2. Step 2: Convert to fraction form
    207,886.17/312,004.51 = 81,615.09/x
  3. Step 3: Cross multiply
    207,886.17x = 312,004.51 × 81,615.09
  4. Step 4: Simplify right side
    207,886.17x = 25,464,276,164.06
  5. Step 5: Solve for x
    x = 25,464,276,164.06/207,886.17
  6. Step 6: Final answer
    x = 122,491.44

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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.