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Finding the Fourth Proportional to 128,670.62, 193,020.16 and 44,421.22

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Solution

The fourth proportional to 128,670.62, 193,020.16 and 44,421.22 is: 66,636.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,670.62 : 193,020.16 = 44,421.22 : x
  2. Step 2: Convert to fraction form
    128,670.62/193,020.16 = 44,421.22/x
  3. Step 3: Cross multiply
    128,670.62x = 193,020.16 × 44,421.22
  4. Step 4: Simplify right side
    128,670.62x = 8,574,190,991.80
  5. Step 5: Solve for x
    x = 8,574,190,991.80/128,670.62
  6. Step 6: Final answer
    x = 66,636.74

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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.