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Finding the Fourth Proportional to 85,003.62, 127,478.29 and 28,064.87

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Solution

The fourth proportional to 85,003.62, 127,478.29 and 28,064.87 is: 42,088.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,003.62 : 127,478.29 = 28,064.87 : x
  2. Step 2: Convert to fraction form
    85,003.62/127,478.29 = 28,064.87/x
  3. Step 3: Cross multiply
    85,003.62x = 127,478.29 × 28,064.87
  4. Step 4: Simplify right side
    85,003.62x = 3,577,661,636.67
  5. Step 5: Solve for x
    x = 3,577,661,636.67/85,003.62
  6. Step 6: Final answer
    x = 42,088.34

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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.