Home / 85,821.30-128,733.14-26,653.23

Finding the Fourth Proportional to 85,821.30, 128,733.14 and 26,653.23

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Solution

The fourth proportional to 85,821.30, 128,733.14 and 26,653.23 is: 39,980.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,821.30 : 128,733.14 = 26,653.23 : x
  2. Step 2: Convert to fraction form
    85,821.30/128,733.14 = 26,653.23/x
  3. Step 3: Cross multiply
    85,821.30x = 128,733.14 × 26,653.23
  4. Step 4: Simplify right side
    85,821.30x = 3,431,154,055.68
  5. Step 5: Solve for x
    x = 3,431,154,055.68/85,821.30
  6. Step 6: Final answer
    x = 39,980.22

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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.