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Finding the Fourth Proportional to 115,998.90, 173,998.35 and 79,134.90

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Solution

The fourth proportional to 115,998.90, 173,998.35 and 79,134.90 is: 118,702.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,998.90 : 173,998.35 = 79,134.90 : x
  2. Step 2: Convert to fraction form
    115,998.90/173,998.35 = 79,134.90/x
  3. Step 3: Cross multiply
    115,998.90x = 173,998.35 × 79,134.90
  4. Step 4: Simplify right side
    115,998.90x = 13,769,342,027.42
  5. Step 5: Solve for x
    x = 13,769,342,027.42/115,998.90
  6. Step 6: Final answer
    x = 118,702.35

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1.5x scale

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.