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Finding the Fourth Proportional to 120,392.81, 180,663.02 and 53,889.17

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Solution

The fourth proportional to 120,392.81, 180,663.02 and 53,889.17 is: 80,866.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,392.81 : 180,663.02 = 53,889.17 : x
  2. Step 2: Convert to fraction form
    120,392.81/180,663.02 = 53,889.17/x
  3. Step 3: Cross multiply
    120,392.81x = 180,663.02 × 53,889.17
  4. Step 4: Simplify right side
    120,392.81x = 9,735,780,197.49
  5. Step 5: Solve for x
    x = 9,735,780,197.49/120,392.81
  6. Step 6: Final answer
    x = 80,866.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.