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Finding the Fourth Proportional to 145,412.70, 218,118.64 and 45,573.32

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Solution

The fourth proportional to 145,412.70, 218,118.64 and 45,573.32 is: 68,359.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,412.70 : 218,118.64 = 45,573.32 : x
  2. Step 2: Convert to fraction form
    145,412.70/218,118.64 = 45,573.32/x
  3. Step 3: Cross multiply
    145,412.70x = 218,118.64 × 45,573.32
  4. Step 4: Simplify right side
    145,412.70x = 9,940,390,578.68
  5. Step 5: Solve for x
    x = 9,940,390,578.68/145,412.70
  6. Step 6: Final answer
    x = 68,359.85

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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.