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Finding the Fourth Proportional to 71,130.84, 98,130.06 and 49,923.96

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Solution

The fourth proportional to 71,130.84, 98,130.06 and 49,923.96 is: 68,873.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,130.84 : 98,130.06 = 49,923.96 : x
  2. Step 2: Convert to fraction form
    71,130.84/98,130.06 = 49,923.96/x
  3. Step 3: Cross multiply
    71,130.84x = 98,130.06 × 49,923.96
  4. Step 4: Simplify right side
    71,130.84x = 4,899,041,190.24
  5. Step 5: Solve for x
    x = 4,899,041,190.24/71,130.84
  6. Step 6: Final answer
    x = 68,873.66

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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.