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Finding the Fourth Proportional to 221,700.40, 305,849.36 and 135,663.51

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Solution

The fourth proportional to 221,700.40, 305,849.36 and 135,663.51 is: 187,156.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,700.40 : 305,849.36 = 135,663.51 : x
  2. Step 2: Convert to fraction form
    221,700.40/305,849.36 = 135,663.51/x
  3. Step 3: Cross multiply
    221,700.40x = 305,849.36 × 135,663.51
  4. Step 4: Simplify right side
    221,700.40x = 41,492,597,708.85
  5. Step 5: Solve for x
    x = 41,492,597,708.85/221,700.40
  6. Step 6: Final answer
    x = 187,156.17

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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.