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Finding the Fourth Proportional to 102,905.70, 154,686.60 and 97,000.80

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Solution

The fourth proportional to 102,905.70, 154,686.60 and 97,000.80 is: 145,810.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,905.70 : 154,686.60 = 97,000.80 : x
  2. Step 2: Convert to fraction form
    102,905.70/154,686.60 = 97,000.80/x
  3. Step 3: Cross multiply
    102,905.70x = 154,686.60 × 97,000.80
  4. Step 4: Simplify right side
    102,905.70x = 15,004,723,949.28
  5. Step 5: Solve for x
    x = 15,004,723,949.28/102,905.70
  6. Step 6: Final answer
    x = 145,810.43

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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.