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Finding the Fourth Proportional to 78,144.48, 117,220.32 and 22,740.48

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Solution

The fourth proportional to 78,144.48, 117,220.32 and 22,740.48 is: 34,111.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,144.48 : 117,220.32 = 22,740.48 : x
  2. Step 2: Convert to fraction form
    78,144.48/117,220.32 = 22,740.48/x
  3. Step 3: Cross multiply
    78,144.48x = 117,220.32 × 22,740.48
  4. Step 4: Simplify right side
    78,144.48x = 2,665,646,342.55
  5. Step 5: Solve for x
    x = 2,665,646,342.55/78,144.48
  6. Step 6: Final answer
    x = 34,111.77

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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.