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Finding the Fourth Proportional to 104,280, 144,025.20 and 70,687.68

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Solution

The fourth proportional to 104,280, 144,025.20 and 70,687.68 is: 97,629.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,280 : 144,025.20 = 70,687.68 : x
  2. Step 2: Convert to fraction form
    104,280/144,025.20 = 70,687.68/x
  3. Step 3: Cross multiply
    104,280x = 144,025.20 × 70,687.68
  4. Step 4: Simplify right side
    104,280x = 10,180,807,249.54
  5. Step 5: Solve for x
    x = 10,180,807,249.54/104,280
  6. Step 6: Final answer
    x = 97,629.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.