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Finding the Fourth Proportional to 153,253.96, 211,488.43 and 86,185.96

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Solution

The fourth proportional to 153,253.96, 211,488.43 and 86,185.96 is: 118,935.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,253.96 : 211,488.43 = 86,185.96 : x
  2. Step 2: Convert to fraction form
    153,253.96/211,488.43 = 86,185.96/x
  3. Step 3: Cross multiply
    153,253.96x = 211,488.43 × 86,185.96
  4. Step 4: Simplify right side
    153,253.96x = 18,227,332,095.54
  5. Step 5: Solve for x
    x = 18,227,332,095.54/153,253.96
  6. Step 6: Final answer
    x = 118,935.48

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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.