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Finding the Fourth Proportional to 86,691.50, 130,063.83 and 77,750.33

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Solution

The fourth proportional to 86,691.50, 130,063.83 and 77,750.33 is: 116,649.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,691.50 : 130,063.83 = 77,750.33 : x
  2. Step 2: Convert to fraction form
    86,691.50/130,063.83 = 77,750.33/x
  3. Step 3: Cross multiply
    86,691.50x = 130,063.83 × 77,750.33
  4. Step 4: Simplify right side
    86,691.50x = 10,112,505,703.56
  5. Step 5: Solve for x
    x = 10,112,505,703.56/86,691.50
  6. Step 6: Final answer
    x = 116,649.33

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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.