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Finding the Fourth Proportional to 201,712.10, 302,568.15 and 145,724.90

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Solution

The fourth proportional to 201,712.10, 302,568.15 and 145,724.90 is: 218,587.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,712.10 : 302,568.15 = 145,724.90 : x
  2. Step 2: Convert to fraction form
    201,712.10/302,568.15 = 145,724.90/x
  3. Step 3: Cross multiply
    201,712.10x = 302,568.15 × 145,724.90
  4. Step 4: Simplify right side
    201,712.10x = 44,091,713,401.94
  5. Step 5: Solve for x
    x = 44,091,713,401.94/201,712.10
  6. Step 6: Final answer
    x = 218,587.35

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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.