Home / 85,845.39-128,743.47-29,670.81

Finding the Fourth Proportional to 85,845.39, 128,743.47 and 29,670.81

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Solution

The fourth proportional to 85,845.39, 128,743.47 and 29,670.81 is: 44,497.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,845.39 : 128,743.47 = 29,670.81 : x
  2. Step 2: Convert to fraction form
    85,845.39/128,743.47 = 29,670.81/x
  3. Step 3: Cross multiply
    85,845.39x = 128,743.47 × 29,670.81
  4. Step 4: Simplify right side
    85,845.39x = 3,819,923,037.11
  5. Step 5: Solve for x
    x = 3,819,923,037.11/85,845.39
  6. Step 6: Final answer
    x = 44,497.71

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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.