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Finding the Fourth Proportional to 133,038.40, 198,981.60 and 119,099.20

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Solution

The fourth proportional to 133,038.40, 198,981.60 and 119,099.20 is: 178,133.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,038.40 : 198,981.60 = 119,099.20 : x
  2. Step 2: Convert to fraction form
    133,038.40/198,981.60 = 119,099.20/x
  3. Step 3: Cross multiply
    133,038.40x = 198,981.60 × 119,099.20
  4. Step 4: Simplify right side
    133,038.40x = 23,698,549,374.72
  5. Step 5: Solve for x
    x = 23,698,549,374.72/133,038.40
  6. Step 6: Final answer
    x = 178,133.15

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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.