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Finding the Fourth Proportional to 57,643.60, 86,465.40 and 45,979.60

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Solution

The fourth proportional to 57,643.60, 86,465.40 and 45,979.60 is: 68,969.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,643.60 : 86,465.40 = 45,979.60 : x
  2. Step 2: Convert to fraction form
    57,643.60/86,465.40 = 45,979.60/x
  3. Step 3: Cross multiply
    57,643.60x = 86,465.40 × 45,979.60
  4. Step 4: Simplify right side
    57,643.60x = 3,975,644,505.84
  5. Step 5: Solve for x
    x = 3,975,644,505.84/57,643.60
  6. Step 6: Final answer
    x = 68,969.40

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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.