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Finding the Fourth Proportional to 85,969.28, 128,787.06 and 48,414.80

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Solution

The fourth proportional to 85,969.28, 128,787.06 and 48,414.80 is: 72,528.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,969.28 : 128,787.06 = 48,414.80 : x
  2. Step 2: Convert to fraction form
    85,969.28/128,787.06 = 48,414.80/x
  3. Step 3: Cross multiply
    85,969.28x = 128,787.06 × 48,414.80
  4. Step 4: Simplify right side
    85,969.28x = 6,235,199,752.49
  5. Step 5: Solve for x
    x = 6,235,199,752.49/85,969.28
  6. Step 6: Final answer
    x = 72,528.23

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1.5x scale

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.