Home / 85,726.85-128,638.87-46,283.09

Finding the Fourth Proportional to 85,726.85, 128,638.87 and 46,283.09

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Solution

The fourth proportional to 85,726.85, 128,638.87 and 46,283.09 is: 69,450.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,726.85 : 128,638.87 = 46,283.09 : x
  2. Step 2: Convert to fraction form
    85,726.85/128,638.87 = 46,283.09/x
  3. Step 3: Cross multiply
    85,726.85x = 128,638.87 × 46,283.09
  4. Step 4: Simplify right side
    85,726.85x = 5,953,803,638.81
  5. Step 5: Solve for x
    x = 5,953,803,638.81/85,726.85
  6. Step 6: Final answer
    x = 69,450.87

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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.