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Finding the Fourth Proportional to 261,165.90, 391,859.58 and 142,698.84

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Solution

The fourth proportional to 261,165.90, 391,859.58 and 142,698.84 is: 214,108.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,165.90 : 391,859.58 = 142,698.84 : x
  2. Step 2: Convert to fraction form
    261,165.90/391,859.58 = 142,698.84/x
  3. Step 3: Cross multiply
    261,165.90x = 391,859.58 × 142,698.84
  4. Step 4: Simplify right side
    261,165.90x = 55,917,907,508.89
  5. Step 5: Solve for x
    x = 55,917,907,508.89/261,165.90
  6. Step 6: Final answer
    x = 214,108.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.