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Finding the Fourth Proportional to 223,812.92, 308,903.28 and 128,320.40

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Solution

The fourth proportional to 223,812.92, 308,903.28 and 128,320.40 is: 177,105.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,812.92 : 308,903.28 = 128,320.40 : x
  2. Step 2: Convert to fraction form
    223,812.92/308,903.28 = 128,320.40/x
  3. Step 3: Cross multiply
    223,812.92x = 308,903.28 × 128,320.40
  4. Step 4: Simplify right side
    223,812.92x = 39,638,592,450.91
  5. Step 5: Solve for x
    x = 39,638,592,450.91/223,812.92
  6. Step 6: Final answer
    x = 177,105.92

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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.