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Finding the Fourth Proportional to 85,818.91, 128,707.86 and 29,661.01

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Solution

The fourth proportional to 85,818.91, 128,707.86 and 29,661.01 is: 44,484.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,818.91 : 128,707.86 = 29,661.01 : x
  2. Step 2: Convert to fraction form
    85,818.91/128,707.86 = 29,661.01/x
  3. Step 3: Cross multiply
    85,818.91x = 128,707.86 × 29,661.01
  4. Step 4: Simplify right side
    85,818.91x = 3,817,605,122.54
  5. Step 5: Solve for x
    x = 3,817,605,122.54/85,818.91
  6. Step 6: Final answer
    x = 44,484.43

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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.