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Finding the Fourth Proportional to 207,195.40, 310,714.98 and 66,916.36

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Solution

The fourth proportional to 207,195.40, 310,714.98 and 66,916.36 is: 100,349.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,195.40 : 310,714.98 = 66,916.36 : x
  2. Step 2: Convert to fraction form
    207,195.40/310,714.98 = 66,916.36/x
  3. Step 3: Cross multiply
    207,195.40x = 310,714.98 × 66,916.36
  4. Step 4: Simplify right side
    207,195.40x = 20,791,915,459.07
  5. Step 5: Solve for x
    x = 20,791,915,459.07/207,195.40
  6. Step 6: Final answer
    x = 100,349.31

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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.