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Finding the Fourth Proportional to 374,111.70, 561,218.34 and 121,309.74

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Solution

The fourth proportional to 374,111.70, 561,218.34 and 121,309.74 is: 181,981.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    374,111.70 : 561,218.34 = 121,309.74 : x
  2. Step 2: Convert to fraction form
    374,111.70/561,218.34 = 121,309.74/x
  3. Step 3: Cross multiply
    374,111.70x = 561,218.34 × 121,309.74
  4. Step 4: Simplify right side
    374,111.70x = 68,081,250,908.63
  5. Step 5: Solve for x
    x = 68,081,250,908.63/374,111.70
  6. Step 6: Final answer
    x = 181,981.08

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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.