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Finding the Fourth Proportional to 138,185.67, 190,680.77 and 77,755.08

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Solution

The fourth proportional to 138,185.67, 190,680.77 and 77,755.08 is: 107,293.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,185.67 : 190,680.77 = 77,755.08 : x
  2. Step 2: Convert to fraction form
    138,185.67/190,680.77 = 77,755.08/x
  3. Step 3: Cross multiply
    138,185.67x = 190,680.77 × 77,755.08
  4. Step 4: Simplify right side
    138,185.67x = 14,826,398,720.20
  5. Step 5: Solve for x
    x = 14,826,398,720.20/138,185.67
  6. Step 6: Final answer
    x = 107,293.32

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1.5x scale

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.