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Finding the Fourth Proportional to 139,362.72, 192,313.28 and 75,700.40

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Solution

The fourth proportional to 139,362.72, 192,313.28 and 75,700.40 is: 104,462.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,362.72 : 192,313.28 = 75,700.40 : x
  2. Step 2: Convert to fraction form
    139,362.72/192,313.28 = 75,700.40/x
  3. Step 3: Cross multiply
    139,362.72x = 192,313.28 × 75,700.40
  4. Step 4: Simplify right side
    139,362.72x = 14,558,192,221.31
  5. Step 5: Solve for x
    x = 14,558,192,221.31/139,362.72
  6. Step 6: Final answer
    x = 104,462.60

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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.