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Finding the Fourth Proportional to 139,107.70, 191,968.85 and 75,445.55

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Solution

The fourth proportional to 139,107.70, 191,968.85 and 75,445.55 is: 104,114.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,107.70 : 191,968.85 = 75,445.55 : x
  2. Step 2: Convert to fraction form
    139,107.70/191,968.85 = 75,445.55/x
  3. Step 3: Cross multiply
    139,107.70x = 191,968.85 × 75,445.55
  4. Step 4: Simplify right side
    139,107.70x = 14,483,195,471.12
  5. Step 5: Solve for x
    x = 14,483,195,471.12/139,107.70
  6. Step 6: Final answer
    x = 104,114.98

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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.