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Finding the Fourth Proportional to 132,843.61, 183,320.51 and 72,415.43

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Solution

The fourth proportional to 132,843.61, 183,320.51 and 72,415.43 is: 99,931.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,843.61 : 183,320.51 = 72,415.43 : x
  2. Step 2: Convert to fraction form
    132,843.61/183,320.51 = 72,415.43/x
  3. Step 3: Cross multiply
    132,843.61x = 183,320.51 × 72,415.43
  4. Step 4: Simplify right side
    132,843.61x = 13,275,233,559.47
  5. Step 5: Solve for x
    x = 13,275,233,559.47/132,843.61
  6. Step 6: Final answer
    x = 99,931.29

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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.