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Finding the Fourth Proportional to 103,514.40, 155,271.60 and 72,021.60

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Solution

The fourth proportional to 103,514.40, 155,271.60 and 72,021.60 is: 108,032.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,514.40 : 155,271.60 = 72,021.60 : x
  2. Step 2: Convert to fraction form
    103,514.40/155,271.60 = 72,021.60/x
  3. Step 3: Cross multiply
    103,514.40x = 155,271.60 × 72,021.60
  4. Step 4: Simplify right side
    103,514.40x = 11,182,909,066.56
  5. Step 5: Solve for x
    x = 11,182,909,066.56/103,514.40
  6. Step 6: Final answer
    x = 108,032.40

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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.