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Finding the Fourth Proportional to 115,378.52, 159,236.85 and 66,970.03

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Solution

The fourth proportional to 115,378.52, 159,236.85 and 66,970.03 is: 92,427.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,378.52 : 159,236.85 = 66,970.03 : x
  2. Step 2: Convert to fraction form
    115,378.52/159,236.85 = 66,970.03/x
  3. Step 3: Cross multiply
    115,378.52x = 159,236.85 × 66,970.03
  4. Step 4: Simplify right side
    115,378.52x = 10,664,096,621.61
  5. Step 5: Solve for x
    x = 10,664,096,621.61/115,378.52
  6. Step 6: Final answer
    x = 92,427.05

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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.