Home / 135,485.46-186,969.33-78,124.50

Finding the Fourth Proportional to 135,485.46, 186,969.33 and 78,124.50

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Solution

The fourth proportional to 135,485.46, 186,969.33 and 78,124.50 is: 107,811.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,485.46 : 186,969.33 = 78,124.50 : x
  2. Step 2: Convert to fraction form
    135,485.46/186,969.33 = 78,124.50/x
  3. Step 3: Cross multiply
    135,485.46x = 186,969.33 × 78,124.50
  4. Step 4: Simplify right side
    135,485.46x = 14,606,885,421.59
  5. Step 5: Solve for x
    x = 14,606,885,421.59/135,485.46
  6. Step 6: Final answer
    x = 107,811.46

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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.