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Finding the Fourth Proportional to 258,493.93, 387,741.03 and 81,014.76

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Solution

The fourth proportional to 258,493.93, 387,741.03 and 81,014.76 is: 121,522.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,493.93 : 387,741.03 = 81,014.76 : x
  2. Step 2: Convert to fraction form
    258,493.93/387,741.03 = 81,014.76/x
  3. Step 3: Cross multiply
    258,493.93x = 387,741.03 × 81,014.76
  4. Step 4: Simplify right side
    258,493.93x = 31,412,746,487.60
  5. Step 5: Solve for x
    x = 31,412,746,487.60/258,493.93
  6. Step 6: Final answer
    x = 121,522.18

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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.