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Finding the Fourth Proportional to 86,643.05, 129,963.62 and 27,477.14

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Solution

The fourth proportional to 86,643.05, 129,963.62 and 27,477.14 is: 41,215.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,643.05 : 129,963.62 = 27,477.14 : x
  2. Step 2: Convert to fraction form
    86,643.05/129,963.62 = 27,477.14/x
  3. Step 3: Cross multiply
    86,643.05x = 129,963.62 × 27,477.14
  4. Step 4: Simplify right side
    86,643.05x = 3,571,028,000.52
  5. Step 5: Solve for x
    x = 3,571,028,000.52/86,643.05
  6. Step 6: Final answer
    x = 41,215.40

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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.