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Finding the Fourth Proportional to 85,651.78, 118,191.50 and 51,189.70

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Solution

The fourth proportional to 85,651.78, 118,191.50 and 51,189.70 is: 70,637.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,651.78 : 118,191.50 = 51,189.70 : x
  2. Step 2: Convert to fraction form
    85,651.78/118,191.50 = 51,189.70/x
  3. Step 3: Cross multiply
    85,651.78x = 118,191.50 × 51,189.70
  4. Step 4: Simplify right side
    85,651.78x = 6,050,187,427.55
  5. Step 5: Solve for x
    x = 6,050,187,427.55/85,651.78
  6. Step 6: Final answer
    x = 70,637.03

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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.