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Finding the Fourth Proportional to 153,425.12, 211,726.56 and 86,358.56

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Solution

The fourth proportional to 153,425.12, 211,726.56 and 86,358.56 is: 119,174.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,425.12 : 211,726.56 = 86,358.56 : x
  2. Step 2: Convert to fraction form
    153,425.12/211,726.56 = 86,358.56/x
  3. Step 3: Cross multiply
    153,425.12x = 211,726.56 × 86,358.56
  4. Step 4: Simplify right side
    153,425.12x = 18,284,400,835.35
  5. Step 5: Solve for x
    x = 18,284,400,835.35/153,425.12
  6. Step 6: Final answer
    x = 119,174.75

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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.