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Finding the Fourth Proportional to 206,986.79, 310,600.63 and 87,035.04

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Solution

The fourth proportional to 206,986.79, 310,600.63 and 87,035.04 is: 130,603.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,986.79 : 310,600.63 = 87,035.04 : x
  2. Step 2: Convert to fraction form
    206,986.79/310,600.63 = 87,035.04/x
  3. Step 3: Cross multiply
    206,986.79x = 310,600.63 × 87,035.04
  4. Step 4: Simplify right side
    206,986.79x = 27,033,139,185.64
  5. Step 5: Solve for x
    x = 27,033,139,185.64/206,986.79
  6. Step 6: Final answer
    x = 130,603.21

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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.