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Finding the Fourth Proportional to 445,418.16, 668,056.12 and 129,801.24

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Solution

The fourth proportional to 445,418.16, 668,056.12 and 129,801.24 is: 194,681.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,418.16 : 668,056.12 = 129,801.24 : x
  2. Step 2: Convert to fraction form
    445,418.16/668,056.12 = 129,801.24/x
  3. Step 3: Cross multiply
    445,418.16x = 668,056.12 × 129,801.24
  4. Step 4: Simplify right side
    445,418.16x = 86,714,512,765.59
  5. Step 5: Solve for x
    x = 86,714,512,765.59/445,418.16
  6. Step 6: Final answer
    x = 194,681.13

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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.