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Finding the Fourth Proportional to 104,809.50, 144,639.68 and 57,065.45

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Solution

The fourth proportional to 104,809.50, 144,639.68 and 57,065.45 is: 78,751.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,809.50 : 144,639.68 = 57,065.45 : x
  2. Step 2: Convert to fraction form
    104,809.50/144,639.68 = 57,065.45/x
  3. Step 3: Cross multiply
    104,809.50x = 144,639.68 × 57,065.45
  4. Step 4: Simplify right side
    104,809.50x = 8,253,927,418.53
  5. Step 5: Solve for x
    x = 8,253,927,418.53/104,809.50
  6. Step 6: Final answer
    x = 78,751.71

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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.