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Finding the Fourth Proportional to 133,085.78, 183,661.16 and 72,658.97

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Solution

The fourth proportional to 133,085.78, 183,661.16 and 72,658.97 is: 100,270.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,085.78 : 183,661.16 = 72,658.97 : x
  2. Step 2: Convert to fraction form
    133,085.78/183,661.16 = 72,658.97/x
  3. Step 3: Cross multiply
    133,085.78x = 183,661.16 × 72,658.97
  4. Step 4: Simplify right side
    133,085.78x = 13,344,630,714.61
  5. Step 5: Solve for x
    x = 13,344,630,714.61/133,085.78
  6. Step 6: Final answer
    x = 100,270.90

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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.