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Finding the Fourth Proportional to 287,108.52, 430,662.93 and 129,152.44

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Solution

The fourth proportional to 287,108.52, 430,662.93 and 129,152.44 is: 193,728.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,108.52 : 430,662.93 = 129,152.44 : x
  2. Step 2: Convert to fraction form
    287,108.52/430,662.93 = 129,152.44/x
  3. Step 3: Cross multiply
    287,108.52x = 430,662.93 × 129,152.44
  4. Step 4: Simplify right side
    287,108.52x = 55,621,168,227.05
  5. Step 5: Solve for x
    x = 55,621,168,227.05/287,108.52
  6. Step 6: Final answer
    x = 193,728.73

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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.