Home / 91,640.43-137,482.16-28,457.28

Finding the Fourth Proportional to 91,640.43, 137,482.16 and 28,457.28

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Solution

The fourth proportional to 91,640.43, 137,482.16 and 28,457.28 is: 42,692.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,640.43 : 137,482.16 = 28,457.28 : x
  2. Step 2: Convert to fraction form
    91,640.43/137,482.16 = 28,457.28/x
  3. Step 3: Cross multiply
    91,640.43x = 137,482.16 × 28,457.28
  4. Step 4: Simplify right side
    91,640.43x = 3,912,368,179.84
  5. Step 5: Solve for x
    x = 3,912,368,179.84/91,640.43
  6. Step 6: Final answer
    x = 42,692.60

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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.