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Finding the Fourth Proportional to 85,969.88, 128,913.34 and 36,036.57

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Solution

The fourth proportional to 85,969.88, 128,913.34 and 36,036.57 is: 54,037.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,969.88 : 128,913.34 = 36,036.57 : x
  2. Step 2: Convert to fraction form
    85,969.88/128,913.34 = 36,036.57/x
  3. Step 3: Cross multiply
    85,969.88x = 128,913.34 × 36,036.57
  4. Step 4: Simplify right side
    85,969.88x = 4,645,594,600.84
  5. Step 5: Solve for x
    x = 4,645,594,600.84/85,969.88
  6. Step 6: Final answer
    x = 54,037.47

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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.