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Finding the Fourth Proportional to 66,429.04, 99,649.28 and 19,044.32

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Solution

The fourth proportional to 66,429.04, 99,649.28 and 19,044.32 is: 28,568.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,429.04 : 99,649.28 = 19,044.32 : x
  2. Step 2: Convert to fraction form
    66,429.04/99,649.28 = 19,044.32/x
  3. Step 3: Cross multiply
    66,429.04x = 99,649.28 × 19,044.32
  4. Step 4: Simplify right side
    66,429.04x = 1,897,752,776.09
  5. Step 5: Solve for x
    x = 1,897,752,776.09/66,429.04
  6. Step 6: Final answer
    x = 28,568.12

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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.