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Finding the Fourth Proportional to 68,485.50, 102,420.18 and 52,478.82

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Solution

The fourth proportional to 68,485.50, 102,420.18 and 52,478.82 is: 78,482.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,485.50 : 102,420.18 = 52,478.82 : x
  2. Step 2: Convert to fraction form
    68,485.50/102,420.18 = 52,478.82/x
  3. Step 3: Cross multiply
    68,485.50x = 102,420.18 × 52,478.82
  4. Step 4: Simplify right side
    68,485.50x = 5,374,890,190.59
  5. Step 5: Solve for x
    x = 5,374,890,190.59/68,485.50
  6. Step 6: Final answer
    x = 78,482.16

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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.