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Finding the Fourth Proportional to 212,935.60, 319,288.20 and 88,289.20

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Solution

The fourth proportional to 212,935.60, 319,288.20 and 88,289.20 is: 132,386.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,935.60 : 319,288.20 = 88,289.20 : x
  2. Step 2: Convert to fraction form
    212,935.60/319,288.20 = 88,289.20/x
  3. Step 3: Cross multiply
    212,935.60x = 319,288.20 × 88,289.20
  4. Step 4: Simplify right side
    212,935.60x = 28,189,699,747.44
  5. Step 5: Solve for x
    x = 28,189,699,747.44/212,935.60
  6. Step 6: Final answer
    x = 132,386.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.