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Finding the Fourth Proportional to 153,310.56, 211,568.52 and 86,242.56

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Solution

The fourth proportional to 153,310.56, 211,568.52 and 86,242.56 is: 119,014.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,310.56 : 211,568.52 = 86,242.56 : x
  2. Step 2: Convert to fraction form
    153,310.56/211,568.52 = 86,242.56/x
  3. Step 3: Cross multiply
    153,310.56x = 211,568.52 × 86,242.56
  4. Step 4: Simplify right side
    153,310.56x = 18,246,210,780.21
  5. Step 5: Solve for x
    x = 18,246,210,780.21/153,310.56
  6. Step 6: Final answer
    x = 119,014.70

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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.