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Finding the Fourth Proportional to 86,006.82, 128,776.95 and 75,379.62

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Solution

The fourth proportional to 86,006.82, 128,776.95 and 75,379.62 is: 112,864.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,006.82 : 128,776.95 = 75,379.62 : x
  2. Step 2: Convert to fraction form
    86,006.82/128,776.95 = 75,379.62/x
  3. Step 3: Cross multiply
    86,006.82x = 128,776.95 × 75,379.62
  4. Step 4: Simplify right side
    86,006.82x = 9,707,157,555.76
  5. Step 5: Solve for x
    x = 9,707,157,555.76/86,006.82
  6. Step 6: Final answer
    x = 112,864.97

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1.5x scale

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.