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Finding the Fourth Proportional to 131,415.75, 181,353.74 and 71,799.75

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Solution

The fourth proportional to 131,415.75, 181,353.74 and 71,799.75 is: 99,083.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,415.75 : 181,353.74 = 71,799.75 : x
  2. Step 2: Convert to fraction form
    131,415.75/181,353.74 = 71,799.75/x
  3. Step 3: Cross multiply
    131,415.75x = 181,353.74 × 71,799.75
  4. Step 4: Simplify right side
    131,415.75x = 13,021,152,834.57
  5. Step 5: Solve for x
    x = 13,021,152,834.57/131,415.75
  6. Step 6: Final answer
    x = 99,083.66

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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.