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Finding the Fourth Proportional to 86,485.68, 129,717.79 and 23,310.74

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Solution

The fourth proportional to 86,485.68, 129,717.79 and 23,310.74 is: 34,963.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,485.68 : 129,717.79 = 23,310.74 : x
  2. Step 2: Convert to fraction form
    86,485.68/129,717.79 = 23,310.74/x
  3. Step 3: Cross multiply
    86,485.68x = 129,717.79 × 23,310.74
  4. Step 4: Simplify right side
    86,485.68x = 3,023,817,559.51
  5. Step 5: Solve for x
    x = 3,023,817,559.51/86,485.68
  6. Step 6: Final answer
    x = 34,963.22

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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.