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Finding the Fourth Proportional to 145,614.44, 218,343.36 and 85,663.64

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Solution

The fourth proportional to 145,614.44, 218,343.36 and 85,663.64 is: 128,449.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,614.44 : 218,343.36 = 85,663.64 : x
  2. Step 2: Convert to fraction form
    145,614.44/218,343.36 = 85,663.64/x
  3. Step 3: Cross multiply
    145,614.44x = 218,343.36 × 85,663.64
  4. Step 4: Simplify right side
    145,614.44x = 18,704,086,987.43
  5. Step 5: Solve for x
    x = 18,704,086,987.43/145,614.44
  6. Step 6: Final answer
    x = 128,449.40

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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.