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Finding the Fourth Proportional to 84,019.29, 115,921.74 and 50,000.50

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Solution

The fourth proportional to 84,019.29, 115,921.74 and 50,000.50 is: 68,985.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,019.29 : 115,921.74 = 50,000.50 : x
  2. Step 2: Convert to fraction form
    84,019.29/115,921.74 = 50,000.50/x
  3. Step 3: Cross multiply
    84,019.29x = 115,921.74 × 50,000.50
  4. Step 4: Simplify right side
    84,019.29x = 5,796,144,960.87
  5. Step 5: Solve for x
    x = 5,796,144,960.87/84,019.29
  6. Step 6: Final answer
    x = 68,985.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.