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Finding the Fourth Proportional to 72,321.34, 99,791.54 and 45,444.80

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Solution

The fourth proportional to 72,321.34, 99,791.54 and 45,444.80 is: 62,706.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,321.34 : 99,791.54 = 45,444.80 : x
  2. Step 2: Convert to fraction form
    72,321.34/99,791.54 = 45,444.80/x
  3. Step 3: Cross multiply
    72,321.34x = 99,791.54 × 45,444.80
  4. Step 4: Simplify right side
    72,321.34x = 4,535,006,576.99
  5. Step 5: Solve for x
    x = 4,535,006,576.99/72,321.34
  6. Step 6: Final answer
    x = 62,706.34

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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.