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Finding the Fourth Proportional to 139,221.68, 192,124.32 and 75,559.52

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Solution

The fourth proportional to 139,221.68, 192,124.32 and 75,559.52 is: 104,271.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,221.68 : 192,124.32 = 75,559.52 : x
  2. Step 2: Convert to fraction form
    139,221.68/192,124.32 = 75,559.52/x
  3. Step 3: Cross multiply
    139,221.68x = 192,124.32 × 75,559.52
  4. Step 4: Simplify right side
    139,221.68x = 14,516,821,399.53
  5. Step 5: Solve for x
    x = 14,516,821,399.53/139,221.68
  6. Step 6: Final answer
    x = 104,271.27

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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.