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Finding the Fourth Proportional to 102,989, 154,484.45 and 40,659.50

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Solution

The fourth proportional to 102,989, 154,484.45 and 40,659.50 is: 60,989.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,989 : 154,484.45 = 40,659.50 : x
  2. Step 2: Convert to fraction form
    102,989/154,484.45 = 40,659.50/x
  3. Step 3: Cross multiply
    102,989x = 154,484.45 × 40,659.50
  4. Step 4: Simplify right side
    102,989x = 6,281,260,494.78
  5. Step 5: Solve for x
    x = 6,281,260,494.78/102,989
  6. Step 6: Final answer
    x = 60,989.63

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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.