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Finding the Fourth Proportional to 85,472.85, 128,237.76 and 53,846.40

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Solution

The fourth proportional to 85,472.85, 128,237.76 and 53,846.40 is: 80,787.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,472.85 : 128,237.76 = 53,846.40 : x
  2. Step 2: Convert to fraction form
    85,472.85/128,237.76 = 53,846.40/x
  3. Step 3: Cross multiply
    85,472.85x = 128,237.76 × 53,846.40
  4. Step 4: Simplify right side
    85,472.85x = 6,905,141,720.06
  5. Step 5: Solve for x
    x = 6,905,141,720.06/85,472.85
  6. Step 6: Final answer
    x = 80,787.55

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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.