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Finding the Fourth Proportional to 155,695.06, 214,859.84 and 87,712.85

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Solution

The fourth proportional to 155,695.06, 214,859.84 and 87,712.85 is: 121,044.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,695.06 : 214,859.84 = 87,712.85 : x
  2. Step 2: Convert to fraction form
    155,695.06/214,859.84 = 87,712.85/x
  3. Step 3: Cross multiply
    155,695.06x = 214,859.84 × 87,712.85
  4. Step 4: Simplify right side
    155,695.06x = 18,845,968,904.62
  5. Step 5: Solve for x
    x = 18,845,968,904.62/155,695.06
  6. Step 6: Final answer
    x = 121,044.10

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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.