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Finding the Fourth Proportional to 103,613.98, 155,421.36 and 28,739.98

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Solution

The fourth proportional to 103,613.98, 155,421.36 and 28,739.98 is: 43,110.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,613.98 : 155,421.36 = 28,739.98 : x
  2. Step 2: Convert to fraction form
    103,613.98/155,421.36 = 28,739.98/x
  3. Step 3: Cross multiply
    103,613.98x = 155,421.36 × 28,739.98
  4. Step 4: Simplify right side
    103,613.98x = 4,466,806,777.97
  5. Step 5: Solve for x
    x = 4,466,806,777.97/103,613.98
  6. Step 6: Final answer
    x = 43,110.08

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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.