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Finding the Fourth Proportional to 132,838.19, 183,311.19 and 72,407.51

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Solution

The fourth proportional to 132,838.19, 183,311.19 and 72,407.51 is: 99,919.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,838.19 : 183,311.19 = 72,407.51 : x
  2. Step 2: Convert to fraction form
    132,838.19/183,311.19 = 72,407.51/x
  3. Step 3: Cross multiply
    132,838.19x = 183,311.19 × 72,407.51
  4. Step 4: Simplify right side
    132,838.19x = 13,273,105,906.48
  5. Step 5: Solve for x
    x = 13,273,105,906.48/132,838.19
  6. Step 6: Final answer
    x = 99,919.36

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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.