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Finding the Fourth Proportional to 103,783.10, 155,346.60 and 74,258.60

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Solution

The fourth proportional to 103,783.10, 155,346.60 and 74,258.60 is: 111,153.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,783.10 : 155,346.60 = 74,258.60 : x
  2. Step 2: Convert to fraction form
    103,783.10/155,346.60 = 74,258.60/x
  3. Step 3: Cross multiply
    103,783.10x = 155,346.60 × 74,258.60
  4. Step 4: Simplify right side
    103,783.10x = 11,535,821,030.76
  5. Step 5: Solve for x
    x = 11,535,821,030.76/103,783.10
  6. Step 6: Final answer
    x = 111,153.17

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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.