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Finding the Fourth Proportional to 78,614.88, 108,489.28 and 45,074.40

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Solution

The fourth proportional to 78,614.88, 108,489.28 and 45,074.40 is: 62,203.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,614.88 : 108,489.28 = 45,074.40 : x
  2. Step 2: Convert to fraction form
    78,614.88/108,489.28 = 45,074.40/x
  3. Step 3: Cross multiply
    78,614.88x = 108,489.28 × 45,074.40
  4. Step 4: Simplify right side
    78,614.88x = 4,890,089,202.43
  5. Step 5: Solve for x
    x = 4,890,089,202.43/78,614.88
  6. Step 6: Final answer
    x = 62,203.10

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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.