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Finding the Fourth Proportional to 51,268.50, 70,750.53 and 28,912.50

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Solution

The fourth proportional to 51,268.50, 70,750.53 and 28,912.50 is: 39,899.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,268.50 : 70,750.53 = 28,912.50 : x
  2. Step 2: Convert to fraction form
    51,268.50/70,750.53 = 28,912.50/x
  3. Step 3: Cross multiply
    51,268.50x = 70,750.53 × 28,912.50
  4. Step 4: Simplify right side
    51,268.50x = 2,045,574,698.63
  5. Step 5: Solve for x
    x = 2,045,574,698.63/51,268.50
  6. Step 6: Final answer
    x = 39,899.25

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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.