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Finding the Fourth Proportional to 131,019.79, 180,807.92 and 74,434.27

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Solution

The fourth proportional to 131,019.79, 180,807.92 and 74,434.27 is: 102,719.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,019.79 : 180,807.92 = 74,434.27 : x
  2. Step 2: Convert to fraction form
    131,019.79/180,807.92 = 74,434.27/x
  3. Step 3: Cross multiply
    131,019.79x = 180,807.92 × 74,434.27
  4. Step 4: Simplify right side
    131,019.79x = 13,458,305,163.25
  5. Step 5: Solve for x
    x = 13,458,305,163.25/131,019.79
  6. Step 6: Final answer
    x = 102,719.64

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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.