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Finding the Fourth Proportional to 103,514.60, 155,271.90 and 72,021.80

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Solution

The fourth proportional to 103,514.60, 155,271.90 and 72,021.80 is: 108,032.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,514.60 : 155,271.90 = 72,021.80 : x
  2. Step 2: Convert to fraction form
    103,514.60/155,271.90 = 72,021.80/x
  3. Step 3: Cross multiply
    103,514.60x = 155,271.90 × 72,021.80
  4. Step 4: Simplify right side
    103,514.60x = 11,182,961,727.42
  5. Step 5: Solve for x
    x = 11,182,961,727.42/103,514.60
  6. Step 6: Final answer
    x = 108,032.70

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1.5x scale

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.