Home / 135,085.80-186,441.54-78,529.98

Finding the Fourth Proportional to 135,085.80, 186,441.54 and 78,529.98

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Solution

The fourth proportional to 135,085.80, 186,441.54 and 78,529.98 is: 108,384.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,085.80 : 186,441.54 = 78,529.98 : x
  2. Step 2: Convert to fraction form
    135,085.80/186,441.54 = 78,529.98/x
  3. Step 3: Cross multiply
    135,085.80x = 186,441.54 × 78,529.98
  4. Step 4: Simplify right side
    135,085.80x = 14,641,250,407.37
  5. Step 5: Solve for x
    x = 14,641,250,407.37/135,085.80
  6. Step 6: Final answer
    x = 108,384.82

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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.