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Finding the Fourth Proportional to 67,390.28, 92,939.51 and 53,956.64

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Solution

The fourth proportional to 67,390.28, 92,939.51 and 53,956.64 is: 74,412.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,390.28 : 92,939.51 = 53,956.64 : x
  2. Step 2: Convert to fraction form
    67,390.28/92,939.51 = 53,956.64/x
  3. Step 3: Cross multiply
    67,390.28x = 92,939.51 × 53,956.64
  4. Step 4: Simplify right side
    67,390.28x = 5,014,702,948.37
  5. Step 5: Solve for x
    x = 5,014,702,948.37/67,390.28
  6. Step 6: Final answer
    x = 74,412.85

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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.