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Finding the Fourth Proportional to 103,656.40, 155,369.40 and 56,942.80

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Solution

The fourth proportional to 103,656.40, 155,369.40 and 56,942.80 is: 85,350.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,656.40 : 155,369.40 = 56,942.80 : x
  2. Step 2: Convert to fraction form
    103,656.40/155,369.40 = 56,942.80/x
  3. Step 3: Cross multiply
    103,656.40x = 155,369.40 × 56,942.80
  4. Step 4: Simplify right side
    103,656.40x = 8,847,168,670.32
  5. Step 5: Solve for x
    x = 8,847,168,670.32/103,656.40
  6. Step 6: Final answer
    x = 85,350.92

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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.