Home / 85,845.09-128,783.76-34,557.66

Finding the Fourth Proportional to 85,845.09, 128,783.76 and 34,557.66

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Solution

The fourth proportional to 85,845.09, 128,783.76 and 34,557.66 is: 51,842.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,845.09 : 128,783.76 = 34,557.66 : x
  2. Step 2: Convert to fraction form
    85,845.09/128,783.76 = 34,557.66/x
  3. Step 3: Cross multiply
    85,845.09x = 128,783.76 × 34,557.66
  4. Step 4: Simplify right side
    85,845.09x = 4,450,465,391.60
  5. Step 5: Solve for x
    x = 4,450,465,391.60/85,845.09
  6. Step 6: Final answer
    x = 51,842.98

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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.