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Finding the Fourth Proportional to 57,312.60, 85,968.90 and 39,816.60

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Solution

The fourth proportional to 57,312.60, 85,968.90 and 39,816.60 is: 59,724.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,312.60 : 85,968.90 = 39,816.60 : x
  2. Step 2: Convert to fraction form
    57,312.60/85,968.90 = 39,816.60/x
  3. Step 3: Cross multiply
    57,312.60x = 85,968.90 × 39,816.60
  4. Step 4: Simplify right side
    57,312.60x = 3,422,989,303.74
  5. Step 5: Solve for x
    x = 3,422,989,303.74/57,312.60
  6. Step 6: Final answer
    x = 59,724.90

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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.