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Finding the Fourth Proportional to 86,094.96, 128,764.73 and 76,673.71

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Solution

The fourth proportional to 86,094.96, 128,764.73 and 76,673.71 is: 114,674.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,094.96 : 128,764.73 = 76,673.71 : x
  2. Step 2: Convert to fraction form
    86,094.96/128,764.73 = 76,673.71/x
  3. Step 3: Cross multiply
    86,094.96x = 128,764.73 × 76,673.71
  4. Step 4: Simplify right side
    86,094.96x = 9,872,869,566.25
  5. Step 5: Solve for x
    x = 9,872,869,566.25/86,094.96
  6. Step 6: Final answer
    x = 114,674.19

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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.