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Finding the Fourth Proportional to 155,212.80, 214,118.40 and 104,908.80

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Solution

The fourth proportional to 155,212.80, 214,118.40 and 104,908.80 is: 144,723.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,212.80 : 214,118.40 = 104,908.80 : x
  2. Step 2: Convert to fraction form
    155,212.80/214,118.40 = 104,908.80/x
  3. Step 3: Cross multiply
    155,212.80x = 214,118.40 × 104,908.80
  4. Step 4: Simplify right side
    155,212.80x = 22,462,904,401.92
  5. Step 5: Solve for x
    x = 22,462,904,401.92/155,212.80
  6. Step 6: Final answer
    x = 144,723.27

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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.