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Finding the Fourth Proportional to 153,291.90, 211,361.88 and 104,917.16

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Solution

The fourth proportional to 153,291.90, 211,361.88 and 104,917.16 is: 144,661.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,291.90 : 211,361.88 = 104,917.16 : x
  2. Step 2: Convert to fraction form
    153,291.90/211,361.88 = 104,917.16/x
  3. Step 3: Cross multiply
    153,291.90x = 211,361.88 × 104,917.16
  4. Step 4: Simplify right side
    153,291.90x = 22,175,488,181.86
  5. Step 5: Solve for x
    x = 22,175,488,181.86/153,291.90
  6. Step 6: Final answer
    x = 144,661.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.