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Finding the Fourth Proportional to 66,107.80, 99,036.69 and 51,243.94

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Solution

The fourth proportional to 66,107.80, 99,036.69 and 51,243.94 is: 76,769.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,107.80 : 99,036.69 = 51,243.94 : x
  2. Step 2: Convert to fraction form
    66,107.80/99,036.69 = 51,243.94/x
  3. Step 3: Cross multiply
    66,107.80x = 99,036.69 × 51,243.94
  4. Step 4: Simplify right side
    66,107.80x = 5,075,030,200.16
  5. Step 5: Solve for x
    x = 5,075,030,200.16/66,107.80
  6. Step 6: Final answer
    x = 76,769.01

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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.