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Finding the Fourth Proportional to 137,930.63, 205,688.91 and 136,669.43

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Solution

The fourth proportional to 137,930.63, 205,688.91 and 136,669.43 is: 203,808.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,930.63 : 205,688.91 = 136,669.43 : x
  2. Step 2: Convert to fraction form
    137,930.63/205,688.91 = 136,669.43/x
  3. Step 3: Cross multiply
    137,930.63x = 205,688.91 × 136,669.43
  4. Step 4: Simplify right side
    137,930.63x = 28,111,386,344.99
  5. Step 5: Solve for x
    x = 28,111,386,344.99/137,930.63
  6. Step 6: Final answer
    x = 203,808.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.