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Finding the Fourth Proportional to 102,009.80, 153,014.70 and 68,832.20

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Solution

The fourth proportional to 102,009.80, 153,014.70 and 68,832.20 is: 103,248.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,009.80 : 153,014.70 = 68,832.20 : x
  2. Step 2: Convert to fraction form
    102,009.80/153,014.70 = 68,832.20/x
  3. Step 3: Cross multiply
    102,009.80x = 153,014.70 × 68,832.20
  4. Step 4: Simplify right side
    102,009.80x = 10,532,338,433.34
  5. Step 5: Solve for x
    x = 10,532,338,433.34/102,009.80
  6. Step 6: Final answer
    x = 103,248.30

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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.