Home / 135,128.11-186,457.75-77,745.64

Finding the Fourth Proportional to 135,128.11, 186,457.75 and 77,745.64

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Solution

The fourth proportional to 135,128.11, 186,457.75 and 77,745.64 is: 107,278.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,128.11 : 186,457.75 = 77,745.64 : x
  2. Step 2: Convert to fraction form
    135,128.11/186,457.75 = 77,745.64/x
  3. Step 3: Cross multiply
    135,128.11x = 186,457.75 × 77,745.64
  4. Step 4: Simplify right side
    135,128.11x = 14,496,277,106.71
  5. Step 5: Solve for x
    x = 14,496,277,106.71/135,128.11
  6. Step 6: Final answer
    x = 107,278.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.