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Finding the Fourth Proportional to 145,785.80, 218,613.90 and 57,009.80

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Solution

The fourth proportional to 145,785.80, 218,613.90 and 57,009.80 is: 85,489.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,785.80 : 218,613.90 = 57,009.80 : x
  2. Step 2: Convert to fraction form
    145,785.80/218,613.90 = 57,009.80/x
  3. Step 3: Cross multiply
    145,785.80x = 218,613.90 × 57,009.80
  4. Step 4: Simplify right side
    145,785.80x = 12,463,134,716.22
  5. Step 5: Solve for x
    x = 12,463,134,716.22/145,785.80
  6. Step 6: Final answer
    x = 85,489.36

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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.