Home / 86,989.14-130,285.44-51,856.20

Finding the Fourth Proportional to 86,989.14, 130,285.44 and 51,856.20

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Solution

The fourth proportional to 86,989.14, 130,285.44 and 51,856.20 is: 77,666.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,989.14 : 130,285.44 = 51,856.20 : x
  2. Step 2: Convert to fraction form
    86,989.14/130,285.44 = 51,856.20/x
  3. Step 3: Cross multiply
    86,989.14x = 130,285.44 × 51,856.20
  4. Step 4: Simplify right side
    86,989.14x = 6,756,107,833.73
  5. Step 5: Solve for x
    x = 6,756,107,833.73/86,989.14
  6. Step 6: Final answer
    x = 77,666.11

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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.