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Finding the Fourth Proportional to 83,415.78, 115,115.45 and 45,690.03

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Solution

The fourth proportional to 83,415.78, 115,115.45 and 45,690.03 is: 63,053.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,415.78 : 115,115.45 = 45,690.03 : x
  2. Step 2: Convert to fraction form
    83,415.78/115,115.45 = 45,690.03/x
  3. Step 3: Cross multiply
    83,415.78x = 115,115.45 × 45,690.03
  4. Step 4: Simplify right side
    83,415.78x = 5,259,628,135.51
  5. Step 5: Solve for x
    x = 5,259,628,135.51/83,415.78
  6. Step 6: Final answer
    x = 63,053.16

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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.