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Finding the Fourth Proportional to 72,652.08, 108,978.36 and 20,060.40

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Solution

The fourth proportional to 72,652.08, 108,978.36 and 20,060.40 is: 30,090.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,652.08 : 108,978.36 = 20,060.40 : x
  2. Step 2: Convert to fraction form
    72,652.08/108,978.36 = 20,060.40/x
  3. Step 3: Cross multiply
    72,652.08x = 108,978.36 × 20,060.40
  4. Step 4: Simplify right side
    72,652.08x = 2,186,149,492.94
  5. Step 5: Solve for x
    x = 2,186,149,492.94/72,652.08
  6. Step 6: Final answer
    x = 30,090.67

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.