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Finding the Fourth Proportional to 221,154.71, 331,729.32 and 155,970.66

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Solution

The fourth proportional to 221,154.71, 331,729.32 and 155,970.66 is: 233,954.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,154.71 : 331,729.32 = 155,970.66 : x
  2. Step 2: Convert to fraction form
    221,154.71/331,729.32 = 155,970.66/x
  3. Step 3: Cross multiply
    221,154.71x = 331,729.32 × 155,970.66
  4. Step 4: Simplify right side
    221,154.71x = 51,740,042,810.63
  5. Step 5: Solve for x
    x = 51,740,042,810.63/221,154.71
  6. Step 6: Final answer
    x = 233,954.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.