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Finding the Fourth Proportional to 66,785.93, 100,155.83 and 19,388.17

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Solution

The fourth proportional to 66,785.93, 100,155.83 and 19,388.17 is: 29,075.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,785.93 : 100,155.83 = 19,388.17 : x
  2. Step 2: Convert to fraction form
    66,785.93/100,155.83 = 19,388.17/x
  3. Step 3: Cross multiply
    66,785.93x = 100,155.83 × 19,388.17
  4. Step 4: Simplify right side
    66,785.93x = 1,941,838,258.53
  5. Step 5: Solve for x
    x = 1,941,838,258.53/66,785.93
  6. Step 6: Final answer
    x = 29,075.56

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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.