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Finding the Fourth Proportional to 223,679.50, 308,686.21 and 128,204.62

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Solution

The fourth proportional to 223,679.50, 308,686.21 and 128,204.62 is: 176,927.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,679.50 : 308,686.21 = 128,204.62 : x
  2. Step 2: Convert to fraction form
    223,679.50/308,686.21 = 128,204.62/x
  3. Step 3: Cross multiply
    223,679.50x = 308,686.21 × 128,204.62
  4. Step 4: Simplify right side
    223,679.50x = 39,574,997,160.06
  5. Step 5: Solve for x
    x = 39,574,997,160.06/223,679.50
  6. Step 6: Final answer
    x = 176,927.24

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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.