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Finding the Fourth Proportional to 66,468.03, 99,702.09 and 19,720.50

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Solution

The fourth proportional to 66,468.03, 99,702.09 and 19,720.50 is: 29,580.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,468.03 : 99,702.09 = 19,720.50 : x
  2. Step 2: Convert to fraction form
    66,468.03/99,702.09 = 19,720.50/x
  3. Step 3: Cross multiply
    66,468.03x = 99,702.09 × 19,720.50
  4. Step 4: Simplify right side
    66,468.03x = 1,966,175,065.85
  5. Step 5: Solve for x
    x = 1,966,175,065.85/66,468.03
  6. Step 6: Final answer
    x = 29,580.76

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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.