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Finding the Fourth Proportional to 221,078.79, 305,002.13 and 136,048.23

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Solution

The fourth proportional to 221,078.79, 305,002.13 and 136,048.23 is: 187,693.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,078.79 : 305,002.13 = 136,048.23 : x
  2. Step 2: Convert to fraction form
    221,078.79/305,002.13 = 136,048.23/x
  3. Step 3: Cross multiply
    221,078.79x = 305,002.13 × 136,048.23
  4. Step 4: Simplify right side
    221,078.79x = 41,494,999,252.49
  5. Step 5: Solve for x
    x = 41,494,999,252.49/221,078.79
  6. Step 6: Final answer
    x = 187,693.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.