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Finding the Fourth Proportional to 68,431.59, 102,616.11 and 21,030.17

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Solution

The fourth proportional to 68,431.59, 102,616.11 and 21,030.17 is: 31,535.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,431.59 : 102,616.11 = 21,030.17 : x
  2. Step 2: Convert to fraction form
    68,431.59/102,616.11 = 21,030.17/x
  3. Step 3: Cross multiply
    68,431.59x = 102,616.11 × 21,030.17
  4. Step 4: Simplify right side
    68,431.59x = 2,158,034,143.08
  5. Step 5: Solve for x
    x = 2,158,034,143.08/68,431.59
  6. Step 6: Final answer
    x = 31,535.64

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1.5x scale

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.