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Finding the Fourth Proportional to 145,490.64, 218,289.26 and 61,272

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Solution

The fourth proportional to 145,490.64, 218,289.26 and 61,272 is: 91,930.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,490.64 : 218,289.26 = 61,272 : x
  2. Step 2: Convert to fraction form
    145,490.64/218,289.26 = 61,272/x
  3. Step 3: Cross multiply
    145,490.64x = 218,289.26 × 61,272
  4. Step 4: Simplify right side
    145,490.64x = 13,375,019,232.36
  5. Step 5: Solve for x
    x = 13,375,019,232.36/145,490.64
  6. Step 6: Final answer
    x = 91,930.44

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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.