Home / 105,375.63-145,431.65-69,107.58

Finding the Fourth Proportional to 105,375.63, 145,431.65 and 69,107.58

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Solution

The fourth proportional to 105,375.63, 145,431.65 and 69,107.58 is: 95,377.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,375.63 : 145,431.65 = 69,107.58 : x
  2. Step 2: Convert to fraction form
    105,375.63/145,431.65 = 69,107.58/x
  3. Step 3: Cross multiply
    105,375.63x = 145,431.65 × 69,107.58
  4. Step 4: Simplify right side
    105,375.63x = 10,050,429,559.68
  5. Step 5: Solve for x
    x = 10,050,429,559.68/105,375.63
  6. Step 6: Final answer
    x = 95,377.17

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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.