Home / 85,845.83-128,768.13-26,681.40

Finding the Fourth Proportional to 85,845.83, 128,768.13 and 26,681.40

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Solution

The fourth proportional to 85,845.83, 128,768.13 and 26,681.40 is: 40,021.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,845.83 : 128,768.13 = 26,681.40 : x
  2. Step 2: Convert to fraction form
    85,845.83/128,768.13 = 26,681.40/x
  3. Step 3: Cross multiply
    85,845.83x = 128,768.13 × 26,681.40
  4. Step 4: Simplify right side
    85,845.83x = 3,435,713,983.78
  5. Step 5: Solve for x
    x = 3,435,713,983.78/85,845.83
  6. Step 6: Final answer
    x = 40,021.91

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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.