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Finding the Fourth Proportional to 128,772.94, 193,120.11 and 89,047.30

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Solution

The fourth proportional to 128,772.94, 193,120.11 and 89,047.30 is: 133,543.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,772.94 : 193,120.11 = 89,047.30 : x
  2. Step 2: Convert to fraction form
    128,772.94/193,120.11 = 89,047.30/x
  3. Step 3: Cross multiply
    128,772.94x = 193,120.11 × 89,047.30
  4. Step 4: Simplify right side
    128,772.94x = 17,196,824,371.20
  5. Step 5: Solve for x
    x = 17,196,824,371.20/128,772.94
  6. Step 6: Final answer
    x = 133,543.77

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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.