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Finding the Fourth Proportional to 74,118.30, 111,177.45 and 66,342.30

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Solution

The fourth proportional to 74,118.30, 111,177.45 and 66,342.30 is: 99,513.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,118.30 : 111,177.45 = 66,342.30 : x
  2. Step 2: Convert to fraction form
    74,118.30/111,177.45 = 66,342.30/x
  3. Step 3: Cross multiply
    74,118.30x = 111,177.45 × 66,342.30
  4. Step 4: Simplify right side
    74,118.30x = 7,375,767,741.14
  5. Step 5: Solve for x
    x = 7,375,767,741.14/74,118.30
  6. Step 6: Final answer
    x = 99,513.45

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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.