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Finding the Fourth Proportional to 66,455.02, 99,699.54 and 19,706.68

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Solution

The fourth proportional to 66,455.02, 99,699.54 and 19,706.68 is: 29,565.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,455.02 : 99,699.54 = 19,706.68 : x
  2. Step 2: Convert to fraction form
    66,455.02/99,699.54 = 19,706.68/x
  3. Step 3: Cross multiply
    66,455.02x = 99,699.54 × 19,706.68
  4. Step 4: Simplify right side
    66,455.02x = 1,964,746,930.93
  5. Step 5: Solve for x
    x = 1,964,746,930.93/66,455.02
  6. Step 6: Final answer
    x = 29,565.06

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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.