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Finding the Fourth Proportional to 217,048.10, 325,572.15 and 128,401.70

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Solution

The fourth proportional to 217,048.10, 325,572.15 and 128,401.70 is: 192,602.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,048.10 : 325,572.15 = 128,401.70 : x
  2. Step 2: Convert to fraction form
    217,048.10/325,572.15 = 128,401.70/x
  3. Step 3: Cross multiply
    217,048.10x = 325,572.15 × 128,401.70
  4. Step 4: Simplify right side
    217,048.10x = 41,804,017,532.66
  5. Step 5: Solve for x
    x = 41,804,017,532.66/217,048.10
  6. Step 6: Final answer
    x = 192,602.55

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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.