Home / 85,653.09-128,488.19-29,485.76

Finding the Fourth Proportional to 85,653.09, 128,488.19 and 29,485.76

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Solution

The fourth proportional to 85,653.09, 128,488.19 and 29,485.76 is: 44,231.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,653.09 : 128,488.19 = 29,485.76 : x
  2. Step 2: Convert to fraction form
    85,653.09/128,488.19 = 29,485.76/x
  3. Step 3: Cross multiply
    85,653.09x = 128,488.19 × 29,485.76
  4. Step 4: Simplify right side
    85,653.09x = 3,788,572,106.97
  5. Step 5: Solve for x
    x = 3,788,572,106.97/85,653.09
  6. Step 6: Final answer
    x = 44,231.59

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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.