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Finding the Fourth Proportional to 131,781.79, 181,871.90 and 75,201.67

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Solution

The fourth proportional to 131,781.79, 181,871.90 and 75,201.67 is: 103,785.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,781.79 : 181,871.90 = 75,201.67 : x
  2. Step 2: Convert to fraction form
    131,781.79/181,871.90 = 75,201.67/x
  3. Step 3: Cross multiply
    131,781.79x = 181,871.90 × 75,201.67
  4. Step 4: Simplify right side
    131,781.79x = 13,677,070,606.07
  5. Step 5: Solve for x
    x = 13,677,070,606.07/131,781.79
  6. Step 6: Final answer
    x = 103,785.74

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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.