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Finding the Fourth Proportional to 70,255.64, 105,376.63 and 38,655.31

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Solution

The fourth proportional to 70,255.64, 105,376.63 and 38,655.31 is: 57,979.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,255.64 : 105,376.63 = 38,655.31 : x
  2. Step 2: Convert to fraction form
    70,255.64/105,376.63 = 38,655.31/x
  3. Step 3: Cross multiply
    70,255.64x = 105,376.63 × 38,655.31
  4. Step 4: Simplify right side
    70,255.64x = 4,073,366,299.41
  5. Step 5: Solve for x
    x = 4,073,366,299.41/70,255.64
  6. Step 6: Final answer
    x = 57,979.21

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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.