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Finding the Fourth Proportional to 78,912.98, 118,369.92 and 26,322.31

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Solution

The fourth proportional to 78,912.98, 118,369.92 and 26,322.31 is: 39,483.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,912.98 : 118,369.92 = 26,322.31 : x
  2. Step 2: Convert to fraction form
    78,912.98/118,369.92 = 26,322.31/x
  3. Step 3: Cross multiply
    78,912.98x = 118,369.92 × 26,322.31
  4. Step 4: Simplify right side
    78,912.98x = 3,115,769,728.92
  5. Step 5: Solve for x
    x = 3,115,769,728.92/78,912.98
  6. Step 6: Final answer
    x = 39,483.62

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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.