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Finding the Fourth Proportional to 103,636.60, 155,570.10 and 64,238.20

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Solution

The fourth proportional to 103,636.60, 155,570.10 and 64,238.20 is: 96,428.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,636.60 : 155,570.10 = 64,238.20 : x
  2. Step 2: Convert to fraction form
    103,636.60/155,570.10 = 64,238.20/x
  3. Step 3: Cross multiply
    103,636.60x = 155,570.10 × 64,238.20
  4. Step 4: Simplify right side
    103,636.60x = 9,993,543,197.82
  5. Step 5: Solve for x
    x = 9,993,543,197.82/103,636.60
  6. Step 6: Final answer
    x = 96,428.71

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1.5x scale

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.