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Finding the Fourth Proportional to 86,612.40, 129,917.18 and 27,447.98

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Solution

The fourth proportional to 86,612.40, 129,917.18 and 27,447.98 is: 41,171.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,612.40 : 129,917.18 = 27,447.98 : x
  2. Step 2: Convert to fraction form
    86,612.40/129,917.18 = 27,447.98/x
  3. Step 3: Cross multiply
    86,612.40x = 129,917.18 × 27,447.98
  4. Step 4: Simplify right side
    86,612.40x = 3,565,963,577.33
  5. Step 5: Solve for x
    x = 3,565,963,577.33/86,612.40
  6. Step 6: Final answer
    x = 41,171.51

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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.