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Finding the Fourth Proportional to 153,388.68, 211,643.70 and 89,714.04

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Solution

The fourth proportional to 153,388.68, 211,643.70 and 89,714.04 is: 123,786.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,388.68 : 211,643.70 = 89,714.04 : x
  2. Step 2: Convert to fraction form
    153,388.68/211,643.70 = 89,714.04/x
  3. Step 3: Cross multiply
    153,388.68x = 211,643.70 × 89,714.04
  4. Step 4: Simplify right side
    153,388.68x = 18,987,411,367.55
  5. Step 5: Solve for x
    x = 18,987,411,367.55/153,388.68
  6. Step 6: Final answer
    x = 123,786.26

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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.