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Finding the Fourth Proportional to 70,806.66, 106,210.26 and 28,687.53

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Solution

The fourth proportional to 70,806.66, 106,210.26 and 28,687.53 is: 43,031.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,806.66 : 106,210.26 = 28,687.53 : x
  2. Step 2: Convert to fraction form
    70,806.66/106,210.26 = 28,687.53/x
  3. Step 3: Cross multiply
    70,806.66x = 106,210.26 × 28,687.53
  4. Step 4: Simplify right side
    70,806.66x = 3,046,910,020.06
  5. Step 5: Solve for x
    x = 3,046,910,020.06/70,806.66
  6. Step 6: Final answer
    x = 43,031.40

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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.