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Finding the Fourth Proportional to 86,058.91, 128,812.10 and 45,977.73

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Solution

The fourth proportional to 86,058.91, 128,812.10 and 45,977.73 is: 68,818.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,058.91 : 128,812.10 = 45,977.73 : x
  2. Step 2: Convert to fraction form
    86,058.91/128,812.10 = 45,977.73/x
  3. Step 3: Cross multiply
    86,058.91x = 128,812.10 × 45,977.73
  4. Step 4: Simplify right side
    86,058.91x = 5,922,487,370.91
  5. Step 5: Solve for x
    x = 5,922,487,370.91/86,058.91
  6. Step 6: Final answer
    x = 68,818.99

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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.