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Finding the Fourth Proportional to 68,609.57, 94,669.79 and 40,320.72

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Solution

The fourth proportional to 68,609.57, 94,669.79 and 40,320.72 is: 55,635.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,609.57 : 94,669.79 = 40,320.72 : x
  2. Step 2: Convert to fraction form
    68,609.57/94,669.79 = 40,320.72/x
  3. Step 3: Cross multiply
    68,609.57x = 94,669.79 × 40,320.72
  4. Step 4: Simplify right side
    68,609.57x = 3,817,153,893.45
  5. Step 5: Solve for x
    x = 3,817,153,893.45/68,609.57
  6. Step 6: Final answer
    x = 55,635.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.