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Finding the Fourth Proportional to 153,308.54, 211,571.85 and 85,328.37

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Solution

The fourth proportional to 153,308.54, 211,571.85 and 85,328.37 is: 117,756.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,308.54 : 211,571.85 = 85,328.37 : x
  2. Step 2: Convert to fraction form
    153,308.54/211,571.85 = 85,328.37/x
  3. Step 3: Cross multiply
    153,308.54x = 211,571.85 × 85,328.37
  4. Step 4: Simplify right side
    153,308.54x = 18,053,081,098.38
  5. Step 5: Solve for x
    x = 18,053,081,098.38/153,308.54
  6. Step 6: Final answer
    x = 117,756.53

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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.