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Finding the Fourth Proportional to 313,638.60, 470,501.10 and 136,140.60

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Solution

The fourth proportional to 313,638.60, 470,501.10 and 136,140.60 is: 204,229.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,638.60 : 470,501.10 = 136,140.60 : x
  2. Step 2: Convert to fraction form
    313,638.60/470,501.10 = 136,140.60/x
  3. Step 3: Cross multiply
    313,638.60x = 470,501.10 × 136,140.60
  4. Step 4: Simplify right side
    313,638.60x = 64,054,302,054.66
  5. Step 5: Solve for x
    x = 64,054,302,054.66/313,638.60
  6. Step 6: Final answer
    x = 204,229.65

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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.