Home / 103,899.21-143,314.43-72,056.49

Finding the Fourth Proportional to 103,899.21, 143,314.43 and 72,056.49

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Solution

The fourth proportional to 103,899.21, 143,314.43 and 72,056.49 is: 99,391.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,899.21 : 143,314.43 = 72,056.49 : x
  2. Step 2: Convert to fraction form
    103,899.21/143,314.43 = 72,056.49/x
  3. Step 3: Cross multiply
    103,899.21x = 143,314.43 × 72,056.49
  4. Step 4: Simplify right side
    103,899.21x = 10,326,734,431.87
  5. Step 5: Solve for x
    x = 10,326,734,431.87/103,899.21
  6. Step 6: Final answer
    x = 99,391.85

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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.