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Finding the Fourth Proportional to 97,297.70, 145,662.21 and 87,959.21

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Solution

The fourth proportional to 97,297.70, 145,662.21 and 87,959.21 is: 131,681.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,297.70 : 145,662.21 = 87,959.21 : x
  2. Step 2: Convert to fraction form
    97,297.70/145,662.21 = 87,959.21/x
  3. Step 3: Cross multiply
    97,297.70x = 145,662.21 × 87,959.21
  4. Step 4: Simplify right side
    97,297.70x = 12,812,332,918.45
  5. Step 5: Solve for x
    x = 12,812,332,918.45/97,297.70
  6. Step 6: Final answer
    x = 131,681.77

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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.