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Finding the Fourth Proportional to 153,665.65, 211,979.55 and 102,662.08

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Solution

The fourth proportional to 153,665.65, 211,979.55 and 102,662.08 is: 141,620.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,665.65 : 211,979.55 = 102,662.08 : x
  2. Step 2: Convert to fraction form
    153,665.65/211,979.55 = 102,662.08/x
  3. Step 3: Cross multiply
    153,665.65x = 211,979.55 × 102,662.08
  4. Step 4: Simplify right side
    153,665.65x = 21,762,261,520.46
  5. Step 5: Solve for x
    x = 21,762,261,520.46/153,665.65
  6. Step 6: Final answer
    x = 141,620.86

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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.