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Finding the Fourth Proportional to 74,655.60, 111,659.40 and 66,814.80

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Solution

The fourth proportional to 74,655.60, 111,659.40 and 66,814.80 is: 99,932.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,655.60 : 111,659.40 = 66,814.80 : x
  2. Step 2: Convert to fraction form
    74,655.60/111,659.40 = 66,814.80/x
  3. Step 3: Cross multiply
    74,655.60x = 111,659.40 × 66,814.80
  4. Step 4: Simplify right side
    74,655.60x = 7,460,500,479.12
  5. Step 5: Solve for x
    x = 7,460,500,479.12/74,655.60
  6. Step 6: Final answer
    x = 99,932.23

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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.