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Finding the Fourth Proportional to 103,421.60, 155,132.40 and 92,146.40

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Solution

The fourth proportional to 103,421.60, 155,132.40 and 92,146.40 is: 138,219.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,421.60 : 155,132.40 = 92,146.40 : x
  2. Step 2: Convert to fraction form
    103,421.60/155,132.40 = 92,146.40/x
  3. Step 3: Cross multiply
    103,421.60x = 155,132.40 × 92,146.40
  4. Step 4: Simplify right side
    103,421.60x = 14,294,892,183.36
  5. Step 5: Solve for x
    x = 14,294,892,183.36/103,421.60
  6. Step 6: Final answer
    x = 138,219.60

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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.