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Finding the Fourth Proportional to 45,615.60, 68,423.40 and 42,845.40

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Solution

The fourth proportional to 45,615.60, 68,423.40 and 42,845.40 is: 64,268.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,615.60 : 68,423.40 = 42,845.40 : x
  2. Step 2: Convert to fraction form
    45,615.60/68,423.40 = 42,845.40/x
  3. Step 3: Cross multiply
    45,615.60x = 68,423.40 × 42,845.40
  4. Step 4: Simplify right side
    45,615.60x = 2,931,627,942.36
  5. Step 5: Solve for x
    x = 2,931,627,942.36/45,615.60
  6. Step 6: Final answer
    x = 64,268.10

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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.