Home / 78,690.28-108,591.24-42,880.60

Finding the Fourth Proportional to 78,690.28, 108,591.24 and 42,880.60

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Solution

The fourth proportional to 78,690.28, 108,591.24 and 42,880.60 is: 59,174.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,690.28 : 108,591.24 = 42,880.60 : x
  2. Step 2: Convert to fraction form
    78,690.28/108,591.24 = 42,880.60/x
  3. Step 3: Cross multiply
    78,690.28x = 108,591.24 × 42,880.60
  4. Step 4: Simplify right side
    78,690.28x = 4,656,457,525.94
  5. Step 5: Solve for x
    x = 4,656,457,525.94/78,690.28
  6. Step 6: Final answer
    x = 59,174.49

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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.