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Finding the Fourth Proportional to 224,478.54, 309,737.52 and 128,989.26

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Solution

The fourth proportional to 224,478.54, 309,737.52 and 128,989.26 is: 177,980.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    224,478.54 : 309,737.52 = 128,989.26 : x
  2. Step 2: Convert to fraction form
    224,478.54/309,737.52 = 128,989.26/x
  3. Step 3: Cross multiply
    224,478.54x = 309,737.52 × 128,989.26
  4. Step 4: Simplify right side
    224,478.54x = 39,952,813,499.04
  5. Step 5: Solve for x
    x = 39,952,813,499.04/224,478.54
  6. Step 6: Final answer
    x = 177,980.55

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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.