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Finding the Fourth Proportional to 139,485.29, 192,489.54 and 75,823.55

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Solution

The fourth proportional to 139,485.29, 192,489.54 and 75,823.55 is: 104,636.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,485.29 : 192,489.54 = 75,823.55 : x
  2. Step 2: Convert to fraction form
    139,485.29/192,489.54 = 75,823.55/x
  3. Step 3: Cross multiply
    139,485.29x = 192,489.54 × 75,823.55
  4. Step 4: Simplify right side
    139,485.29x = 14,595,239,298.22
  5. Step 5: Solve for x
    x = 14,595,239,298.22/139,485.29
  6. Step 6: Final answer
    x = 104,636.41

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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.