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Finding the Fourth Proportional to 86,670.94, 130,028.28 and 39,956.62

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Solution

The fourth proportional to 86,670.94, 130,028.28 and 39,956.62 is: 59,945.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,670.94 : 130,028.28 = 39,956.62 : x
  2. Step 2: Convert to fraction form
    86,670.94/130,028.28 = 39,956.62/x
  3. Step 3: Cross multiply
    86,670.94x = 130,028.28 × 39,956.62
  4. Step 4: Simplify right side
    86,670.94x = 5,195,490,573.21
  5. Step 5: Solve for x
    x = 5,195,490,573.21/86,670.94
  6. Step 6: Final answer
    x = 59,945.01

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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.