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Finding the Fourth Proportional to 123,714.89, 170,717.96 and 72,729.77

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Solution

The fourth proportional to 123,714.89, 170,717.96 and 72,729.77 is: 100,362.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,714.89 : 170,717.96 = 72,729.77 : x
  2. Step 2: Convert to fraction form
    123,714.89/170,717.96 = 72,729.77/x
  3. Step 3: Cross multiply
    123,714.89x = 170,717.96 × 72,729.77
  4. Step 4: Simplify right side
    123,714.89x = 12,416,276,748.43
  5. Step 5: Solve for x
    x = 12,416,276,748.43/123,714.89
  6. Step 6: Final answer
    x = 100,362.03

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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.