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Finding the Fourth Proportional to 144,138.84, 216,213.12 and 38,958.72

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Solution

The fourth proportional to 144,138.84, 216,213.12 and 38,958.72 is: 58,439.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,138.84 : 216,213.12 = 38,958.72 : x
  2. Step 2: Convert to fraction form
    144,138.84/216,213.12 = 38,958.72/x
  3. Step 3: Cross multiply
    144,138.84x = 216,213.12 × 38,958.72
  4. Step 4: Simplify right side
    144,138.84x = 8,423,386,402.41
  5. Step 5: Solve for x
    x = 8,423,386,402.41/144,138.84
  6. Step 6: Final answer
    x = 58,439.39

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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.