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Finding the Fourth Proportional to 102,709.80, 154,323.90 and 65,287.80

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Solution

The fourth proportional to 102,709.80, 154,323.90 and 65,287.80 is: 98,096.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,709.80 : 154,323.90 = 65,287.80 : x
  2. Step 2: Convert to fraction form
    102,709.80/154,323.90 = 65,287.80/x
  3. Step 3: Cross multiply
    102,709.80x = 154,323.90 × 65,287.80
  4. Step 4: Simplify right side
    102,709.80x = 10,075,467,918.42
  5. Step 5: Solve for x
    x = 10,075,467,918.42/102,709.80
  6. Step 6: Final answer
    x = 98,096.46

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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.