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Finding the Fourth Proportional to 115,999.80, 173,999.70 and 102,780.60

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Solution

The fourth proportional to 115,999.80, 173,999.70 and 102,780.60 is: 154,170.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,999.80 : 173,999.70 = 102,780.60 : x
  2. Step 2: Convert to fraction form
    115,999.80/173,999.70 = 102,780.60/x
  3. Step 3: Cross multiply
    115,999.80x = 173,999.70 × 102,780.60
  4. Step 4: Simplify right side
    115,999.80x = 17,883,793,565.82
  5. Step 5: Solve for x
    x = 17,883,793,565.82/115,999.80
  6. Step 6: Final answer
    x = 154,170.90

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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.