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Finding the Fourth Proportional to 103,682.60, 155,395.90 and 70,402.60

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Solution

The fourth proportional to 103,682.60, 155,395.90 and 70,402.60 is: 105,516.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,682.60 : 155,395.90 = 70,402.60 : x
  2. Step 2: Convert to fraction form
    103,682.60/155,395.90 = 70,402.60/x
  3. Step 3: Cross multiply
    103,682.60x = 155,395.90 × 70,402.60
  4. Step 4: Simplify right side
    103,682.60x = 10,940,275,389.34
  5. Step 5: Solve for x
    x = 10,940,275,389.34/103,682.60
  6. Step 6: Final answer
    x = 105,516.99

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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.