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Finding the Fourth Proportional to 209,114.86, 313,495.94 and 90,697.01

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Solution

The fourth proportional to 209,114.86, 313,495.94 and 90,697.01 is: 135,969.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,114.86 : 313,495.94 = 90,697.01 : x
  2. Step 2: Convert to fraction form
    209,114.86/313,495.94 = 90,697.01/x
  3. Step 3: Cross multiply
    209,114.86x = 313,495.94 × 90,697.01
  4. Step 4: Simplify right side
    209,114.86x = 28,433,142,384.17
  5. Step 5: Solve for x
    x = 28,433,142,384.17/209,114.86
  6. Step 6: Final answer
    x = 135,969.02

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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.