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Finding the Fourth Proportional to 221,402.33, 305,526.40 and 130,787.40

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Solution

The fourth proportional to 221,402.33, 305,526.40 and 130,787.40 is: 180,481.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,402.33 : 305,526.40 = 130,787.40 : x
  2. Step 2: Convert to fraction form
    221,402.33/305,526.40 = 130,787.40/x
  3. Step 3: Cross multiply
    221,402.33x = 305,526.40 × 130,787.40
  4. Step 4: Simplify right side
    221,402.33x = 39,959,003,487.36
  5. Step 5: Solve for x
    x = 39,959,003,487.36/221,402.33
  6. Step 6: Final answer
    x = 180,481.40

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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.