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Finding the Fourth Proportional to 78,182.98, 117,203.39 and 40,699.01

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Solution

The fourth proportional to 78,182.98, 117,203.39 and 40,699.01 is: 61,011.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,182.98 : 117,203.39 = 40,699.01 : x
  2. Step 2: Convert to fraction form
    78,182.98/117,203.39 = 40,699.01/x
  3. Step 3: Cross multiply
    78,182.98x = 117,203.39 × 40,699.01
  4. Step 4: Simplify right side
    78,182.98x = 4,770,061,738.15
  5. Step 5: Solve for x
    x = 4,770,061,738.15/78,182.98
  6. Step 6: Final answer
    x = 61,011.51

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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.