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Finding the Fourth Proportional to 140,065.99, 210,111.81 and 55,805.74

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Solution

The fourth proportional to 140,065.99, 210,111.81 and 55,805.74 is: 83,713.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,065.99 : 210,111.81 = 55,805.74 : x
  2. Step 2: Convert to fraction form
    140,065.99/210,111.81 = 55,805.74/x
  3. Step 3: Cross multiply
    140,065.99x = 210,111.81 × 55,805.74
  4. Step 4: Simplify right side
    140,065.99x = 11,725,445,039.79
  5. Step 5: Solve for x
    x = 11,725,445,039.79/140,065.99
  6. Step 6: Final answer
    x = 83,713.72

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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.