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Finding the Fourth Proportional to 145,514.40, 218,271.60 and 82,269.60

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Solution

The fourth proportional to 145,514.40, 218,271.60 and 82,269.60 is: 123,404.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,514.40 : 218,271.60 = 82,269.60 : x
  2. Step 2: Convert to fraction form
    145,514.40/218,271.60 = 82,269.60/x
  3. Step 3: Cross multiply
    145,514.40x = 218,271.60 × 82,269.60
  4. Step 4: Simplify right side
    145,514.40x = 17,957,117,223.36
  5. Step 5: Solve for x
    x = 17,957,117,223.36/145,514.40
  6. Step 6: Final answer
    x = 123,404.40

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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.