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Finding the Fourth Proportional to 254,685.30, 381,790.43 and 86,088.32

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Solution

The fourth proportional to 254,685.30, 381,790.43 and 86,088.32 is: 129,052.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,685.30 : 381,790.43 = 86,088.32 : x
  2. Step 2: Convert to fraction form
    254,685.30/381,790.43 = 86,088.32/x
  3. Step 3: Cross multiply
    254,685.30x = 381,790.43 × 86,088.32
  4. Step 4: Simplify right side
    254,685.30x = 32,867,696,125.93
  5. Step 5: Solve for x
    x = 32,867,696,125.93/254,685.30
  6. Step 6: Final answer
    x = 129,052.19

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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.