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Finding the Fourth Proportional to 85,945.75, 128,970.47 and 36,697.75

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Solution

The fourth proportional to 85,945.75, 128,970.47 and 36,697.75 is: 55,068.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,945.75 : 128,970.47 = 36,697.75 : x
  2. Step 2: Convert to fraction form
    85,945.75/128,970.47 = 36,697.75/x
  3. Step 3: Cross multiply
    85,945.75x = 128,970.47 × 36,697.75
  4. Step 4: Simplify right side
    85,945.75x = 4,732,926,065.44
  5. Step 5: Solve for x
    x = 4,732,926,065.44/85,945.75
  6. Step 6: Final answer
    x = 55,068.76

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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.