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Finding the Fourth Proportional to 78,459.57, 117,652.37 and 28,504.44

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Solution

The fourth proportional to 78,459.57, 117,652.37 and 28,504.44 is: 42,743.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,459.57 : 117,652.37 = 28,504.44 : x
  2. Step 2: Convert to fraction form
    78,459.57/117,652.37 = 28,504.44/x
  3. Step 3: Cross multiply
    78,459.57x = 117,652.37 × 28,504.44
  4. Step 4: Simplify right side
    78,459.57x = 3,353,614,779.00
  5. Step 5: Solve for x
    x = 3,353,614,779.00/78,459.57
  6. Step 6: Final answer
    x = 42,743.22

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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.