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Finding the Fourth Proportional to 133,215.84, 183,835.68 and 72,785.19

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Solution

The fourth proportional to 133,215.84, 183,835.68 and 72,785.19 is: 100,442.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,215.84 : 183,835.68 = 72,785.19 : x
  2. Step 2: Convert to fraction form
    133,215.84/183,835.68 = 72,785.19/x
  3. Step 3: Cross multiply
    133,215.84x = 183,835.68 × 72,785.19
  4. Step 4: Simplify right side
    133,215.84x = 13,380,514,897.58
  5. Step 5: Solve for x
    x = 13,380,514,897.58/133,215.84
  6. Step 6: Final answer
    x = 100,442.37

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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.