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Finding the Fourth Proportional to 66,682.68, 100,009.14 and 19,929.48

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Solution

The fourth proportional to 66,682.68, 100,009.14 and 19,929.48 is: 29,889.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,682.68 : 100,009.14 = 19,929.48 : x
  2. Step 2: Convert to fraction form
    66,682.68/100,009.14 = 19,929.48/x
  3. Step 3: Cross multiply
    66,682.68x = 100,009.14 × 19,929.48
  4. Step 4: Simplify right side
    66,682.68x = 1,993,130,155.45
  5. Step 5: Solve for x
    x = 1,993,130,155.45/66,682.68
  6. Step 6: Final answer
    x = 29,889.77

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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.