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Finding the Fourth Proportional to 66,495.12, 99,729.60 and 19,737.60

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Solution

The fourth proportional to 66,495.12, 99,729.60 and 19,737.60 is: 29,602.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,495.12 : 99,729.60 = 19,737.60 : x
  2. Step 2: Convert to fraction form
    66,495.12/99,729.60 = 19,737.60/x
  3. Step 3: Cross multiply
    66,495.12x = 99,729.60 × 19,737.60
  4. Step 4: Simplify right side
    66,495.12x = 1,968,422,952.96
  5. Step 5: Solve for x
    x = 1,968,422,952.96/66,495.12
  6. Step 6: Final answer
    x = 29,602.52

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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.