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Finding the Fourth Proportional to 57,775.20, 86,662.80 and 47,277.60

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Solution

The fourth proportional to 57,775.20, 86,662.80 and 47,277.60 is: 70,916.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,775.20 : 86,662.80 = 47,277.60 : x
  2. Step 2: Convert to fraction form
    57,775.20/86,662.80 = 47,277.60/x
  3. Step 3: Cross multiply
    57,775.20x = 86,662.80 × 47,277.60
  4. Step 4: Simplify right side
    57,775.20x = 4,097,209,193.28
  5. Step 5: Solve for x
    x = 4,097,209,193.28/57,775.20
  6. Step 6: Final answer
    x = 70,916.40

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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.