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Finding the Fourth Proportional to 72,639.54, 109,035.63 and 64,372.50

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Solution

The fourth proportional to 72,639.54, 109,035.63 and 64,372.50 is: 96,626.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,639.54 : 109,035.63 = 64,372.50 : x
  2. Step 2: Convert to fraction form
    72,639.54/109,035.63 = 64,372.50/x
  3. Step 3: Cross multiply
    72,639.54x = 109,035.63 × 64,372.50
  4. Step 4: Simplify right side
    72,639.54x = 7,018,896,092.18
  5. Step 5: Solve for x
    x = 7,018,896,092.18/72,639.54
  6. Step 6: Final answer
    x = 96,626.38

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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.