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Finding the Fourth Proportional to 185,487.88, 278,199.51 and 85,639.54

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Solution

The fourth proportional to 185,487.88, 278,199.51 and 85,639.54 is: 128,444.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,487.88 : 278,199.51 = 85,639.54 : x
  2. Step 2: Convert to fraction form
    185,487.88/278,199.51 = 85,639.54/x
  3. Step 3: Cross multiply
    185,487.88x = 278,199.51 × 85,639.54
  4. Step 4: Simplify right side
    185,487.88x = 23,824,878,064.63
  5. Step 5: Solve for x
    x = 23,824,878,064.63/185,487.88
  6. Step 6: Final answer
    x = 128,444.39

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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.