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Finding the Fourth Proportional to 103,788.10, 155,354.10 and 74,263.60

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Solution

The fourth proportional to 103,788.10, 155,354.10 and 74,263.60 is: 111,160.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,788.10 : 155,354.10 = 74,263.60 : x
  2. Step 2: Convert to fraction form
    103,788.10/155,354.10 = 74,263.60/x
  3. Step 3: Cross multiply
    103,788.10x = 155,354.10 × 74,263.60
  4. Step 4: Simplify right side
    103,788.10x = 11,537,154,740.76
  5. Step 5: Solve for x
    x = 11,537,154,740.76/103,788.10
  6. Step 6: Final answer
    x = 111,160.67

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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.