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Finding the Fourth Proportional to 86,002.60, 128,965.02 and 30,600.04

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Solution

The fourth proportional to 86,002.60, 128,965.02 and 30,600.04 is: 45,886.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,002.60 : 128,965.02 = 30,600.04 : x
  2. Step 2: Convert to fraction form
    86,002.60/128,965.02 = 30,600.04/x
  3. Step 3: Cross multiply
    86,002.60x = 128,965.02 × 30,600.04
  4. Step 4: Simplify right side
    86,002.60x = 3,946,334,770.60
  5. Step 5: Solve for x
    x = 3,946,334,770.60/86,002.60
  6. Step 6: Final answer
    x = 45,886.23

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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.