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Finding the Fourth Proportional to 65,178.80, 97,768.20 and 52,056.80

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Solution

The fourth proportional to 65,178.80, 97,768.20 and 52,056.80 is: 78,085.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,178.80 : 97,768.20 = 52,056.80 : x
  2. Step 2: Convert to fraction form
    65,178.80/97,768.20 = 52,056.80/x
  3. Step 3: Cross multiply
    65,178.80x = 97,768.20 × 52,056.80
  4. Step 4: Simplify right side
    65,178.80x = 5,089,499,633.76
  5. Step 5: Solve for x
    x = 5,089,499,633.76/65,178.80
  6. Step 6: Final answer
    x = 78,085.20

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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.