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Finding the Fourth Proportional to 66,071.61, 99,113.69 and 21,698.60

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Solution

The fourth proportional to 66,071.61, 99,113.69 and 21,698.60 is: 32,549.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,071.61 : 99,113.69 = 21,698.60 : x
  2. Step 2: Convert to fraction form
    66,071.61/99,113.69 = 21,698.60/x
  3. Step 3: Cross multiply
    66,071.61x = 99,113.69 × 21,698.60
  4. Step 4: Simplify right side
    66,071.61x = 2,150,627,872.51
  5. Step 5: Solve for x
    x = 2,150,627,872.51/66,071.61
  6. Step 6: Final answer
    x = 32,549.95

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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.