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Finding the Fourth Proportional to 105,115.80, 157,673.70 and 55,176.60

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Solution

The fourth proportional to 105,115.80, 157,673.70 and 55,176.60 is: 82,764.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,115.80 : 157,673.70 = 55,176.60 : x
  2. Step 2: Convert to fraction form
    105,115.80/157,673.70 = 55,176.60/x
  3. Step 3: Cross multiply
    105,115.80x = 157,673.70 × 55,176.60
  4. Step 4: Simplify right side
    105,115.80x = 8,699,898,675.42
  5. Step 5: Solve for x
    x = 8,699,898,675.42/105,115.80
  6. Step 6: Final answer
    x = 82,764.90

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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.