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Finding the Fourth Proportional to 123,243, 170,075.40 and 66,654.36

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Solution

The fourth proportional to 123,243, 170,075.40 and 66,654.36 is: 91,983.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,243 : 170,075.40 = 66,654.36 : x
  2. Step 2: Convert to fraction form
    123,243/170,075.40 = 66,654.36/x
  3. Step 3: Cross multiply
    123,243x = 170,075.40 × 66,654.36
  4. Step 4: Simplify right side
    123,243x = 11,336,266,938.74
  5. Step 5: Solve for x
    x = 11,336,266,938.74/123,243
  6. Step 6: Final answer
    x = 91,983.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.