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Finding the Fourth Proportional to 137,891.95, 206,900.30 and 70,389.11

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Solution

The fourth proportional to 137,891.95, 206,900.30 and 70,389.11 is: 105,615.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,891.95 : 206,900.30 = 70,389.11 : x
  2. Step 2: Convert to fraction form
    137,891.95/206,900.30 = 70,389.11/x
  3. Step 3: Cross multiply
    137,891.95x = 206,900.30 × 70,389.11
  4. Step 4: Simplify right side
    137,891.95x = 14,563,528,668.96
  5. Step 5: Solve for x
    x = 14,563,528,668.96/137,891.95
  6. Step 6: Final answer
    x = 105,615.51

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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.