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Finding the Fourth Proportional to 144,890.60, 217,335.90 and 74,031.80

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Solution

The fourth proportional to 144,890.60, 217,335.90 and 74,031.80 is: 111,047.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,890.60 : 217,335.90 = 74,031.80 : x
  2. Step 2: Convert to fraction form
    144,890.60/217,335.90 = 74,031.80/x
  3. Step 3: Cross multiply
    144,890.60x = 217,335.90 × 74,031.80
  4. Step 4: Simplify right side
    144,890.60x = 16,089,767,881.62
  5. Step 5: Solve for x
    x = 16,089,767,881.62/144,890.60
  6. Step 6: Final answer
    x = 111,047.70

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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.