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Finding the Fourth Proportional to 72,693.78, 108,837.36 and 39,294

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Solution

The fourth proportional to 72,693.78, 108,837.36 and 39,294 is: 58,831.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,693.78 : 108,837.36 = 39,294 : x
  2. Step 2: Convert to fraction form
    72,693.78/108,837.36 = 39,294/x
  3. Step 3: Cross multiply
    72,693.78x = 108,837.36 × 39,294
  4. Step 4: Simplify right side
    72,693.78x = 4,276,655,223.84
  5. Step 5: Solve for x
    x = 4,276,655,223.84/72,693.78
  6. Step 6: Final answer
    x = 58,831.10

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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.