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Finding the Fourth Proportional to 153,354.42, 211,660.56 and 89,707.86

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Solution

The fourth proportional to 153,354.42, 211,660.56 and 89,707.86 is: 123,815.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,354.42 : 211,660.56 = 89,707.86 : x
  2. Step 2: Convert to fraction form
    153,354.42/211,660.56 = 89,707.86/x
  3. Step 3: Cross multiply
    153,354.42x = 211,660.56 × 89,707.86
  4. Step 4: Simplify right side
    153,354.42x = 18,987,615,884.00
  5. Step 5: Solve for x
    x = 18,987,615,884.00/153,354.42
  6. Step 6: Final answer
    x = 123,815.25

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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.