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Finding the Fourth Proportional to 63,990.40, 95,985.60 and 56,214.40

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Solution

The fourth proportional to 63,990.40, 95,985.60 and 56,214.40 is: 84,321.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,990.40 : 95,985.60 = 56,214.40 : x
  2. Step 2: Convert to fraction form
    63,990.40/95,985.60 = 56,214.40/x
  3. Step 3: Cross multiply
    63,990.40x = 95,985.60 × 56,214.40
  4. Step 4: Simplify right side
    63,990.40x = 5,395,772,912.64
  5. Step 5: Solve for x
    x = 5,395,772,912.64/63,990.40
  6. Step 6: Final answer
    x = 84,321.60

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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.