Home / 102,921.83-154,475.01-86,159.76

Finding the Fourth Proportional to 102,921.83, 154,475.01 and 86,159.76

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Solution

The fourth proportional to 102,921.83, 154,475.01 and 86,159.76 is: 129,316.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,921.83 : 154,475.01 = 86,159.76 : x
  2. Step 2: Convert to fraction form
    102,921.83/154,475.01 = 86,159.76/x
  3. Step 3: Cross multiply
    102,921.83x = 154,475.01 × 86,159.76
  4. Step 4: Simplify right side
    102,921.83x = 13,309,529,400.45
  5. Step 5: Solve for x
    x = 13,309,529,400.45/102,921.83
  6. Step 6: Final answer
    x = 129,316.87

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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.