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Finding the Fourth Proportional to 62,978.28, 86,909.32 and 34,683.36

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Solution

The fourth proportional to 62,978.28, 86,909.32 and 34,683.36 is: 47,862.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,978.28 : 86,909.32 = 34,683.36 : x
  2. Step 2: Convert to fraction form
    62,978.28/86,909.32 = 34,683.36/x
  3. Step 3: Cross multiply
    62,978.28x = 86,909.32 × 34,683.36
  4. Step 4: Simplify right side
    62,978.28x = 3,014,307,232.92
  5. Step 5: Solve for x
    x = 3,014,307,232.92/62,978.28
  6. Step 6: Final answer
    x = 47,862.65

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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.