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Finding the Fourth Proportional to 102,989.80, 154,182.30 and 76,810.60

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Solution

The fourth proportional to 102,989.80, 154,182.30 and 76,810.60 is: 114,990.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,989.80 : 154,182.30 = 76,810.60 : x
  2. Step 2: Convert to fraction form
    102,989.80/154,182.30 = 76,810.60/x
  3. Step 3: Cross multiply
    102,989.80x = 154,182.30 × 76,810.60
  4. Step 4: Simplify right side
    102,989.80x = 11,842,834,972.38
  5. Step 5: Solve for x
    x = 11,842,834,972.38/102,989.80
  6. Step 6: Final answer
    x = 114,990.37

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1.5x scale

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.