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Finding the Fourth Proportional to 139,147.71, 192,023.75 and 75,485.51

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Solution

The fourth proportional to 139,147.71, 192,023.75 and 75,485.51 is: 104,169.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,147.71 : 192,023.75 = 75,485.51 : x
  2. Step 2: Convert to fraction form
    139,147.71/192,023.75 = 75,485.51/x
  3. Step 3: Cross multiply
    139,147.71x = 192,023.75 × 75,485.51
  4. Step 4: Simplify right side
    139,147.71x = 14,495,011,369.64
  5. Step 5: Solve for x
    x = 14,495,011,369.64/139,147.71
  6. Step 6: Final answer
    x = 104,169.96

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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.