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Finding the Fourth Proportional to 115,003.80, 158,704.92 and 64,702.80

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Solution

The fourth proportional to 115,003.80, 158,704.92 and 64,702.80 is: 89,289.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,003.80 : 158,704.92 = 64,702.80 : x
  2. Step 2: Convert to fraction form
    115,003.80/158,704.92 = 64,702.80/x
  3. Step 3: Cross multiply
    115,003.80x = 158,704.92 × 64,702.80
  4. Step 4: Simplify right side
    115,003.80x = 10,268,652,697.78
  5. Step 5: Solve for x
    x = 10,268,652,697.78/115,003.80
  6. Step 6: Final answer
    x = 89,289.68

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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.