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Finding the Fourth Proportional to 205,368.60, 308,063.91 and 65,138.16

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Solution

The fourth proportional to 205,368.60, 308,063.91 and 65,138.16 is: 97,710.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,368.60 : 308,063.91 = 65,138.16 : x
  2. Step 2: Convert to fraction form
    205,368.60/308,063.91 = 65,138.16/x
  3. Step 3: Cross multiply
    205,368.60x = 308,063.91 × 65,138.16
  4. Step 4: Simplify right side
    205,368.60x = 20,066,716,259.81
  5. Step 5: Solve for x
    x = 20,066,716,259.81/205,368.60
  6. Step 6: Final answer
    x = 97,710.73

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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.