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Finding the Fourth Proportional to 101,665.50, 140,264.78 and 61,363.96

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Solution

The fourth proportional to 101,665.50, 140,264.78 and 61,363.96 is: 84,661.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,665.50 : 140,264.78 = 61,363.96 : x
  2. Step 2: Convert to fraction form
    101,665.50/140,264.78 = 61,363.96/x
  3. Step 3: Cross multiply
    101,665.50x = 140,264.78 × 61,363.96
  4. Step 4: Simplify right side
    101,665.50x = 8,607,202,349.33
  5. Step 5: Solve for x
    x = 8,607,202,349.33/101,665.50
  6. Step 6: Final answer
    x = 84,661.98

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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.