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Finding the Fourth Proportional to 206,862.47, 310,293.71 and 66,621.09

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Solution

The fourth proportional to 206,862.47, 310,293.71 and 66,621.09 is: 99,931.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,862.47 : 310,293.71 = 66,621.09 : x
  2. Step 2: Convert to fraction form
    206,862.47/310,293.71 = 66,621.09/x
  3. Step 3: Cross multiply
    206,862.47x = 310,293.71 × 66,621.09
  4. Step 4: Simplify right side
    206,862.47x = 20,672,106,260.67
  5. Step 5: Solve for x
    x = 20,672,106,260.67/206,862.47
  6. Step 6: Final answer
    x = 99,931.64

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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.