Home / 128,758.98-177,621.34-77,743.56

Finding the Fourth Proportional to 128,758.98, 177,621.34 and 77,743.56

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Solution

The fourth proportional to 128,758.98, 177,621.34 and 77,743.56 is: 107,246.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,758.98 : 177,621.34 = 77,743.56 : x
  2. Step 2: Convert to fraction form
    128,758.98/177,621.34 = 77,743.56/x
  3. Step 3: Cross multiply
    128,758.98x = 177,621.34 × 77,743.56
  4. Step 4: Simplify right side
    128,758.98x = 13,808,915,303.57
  5. Step 5: Solve for x
    x = 13,808,915,303.57/128,758.98
  6. Step 6: Final answer
    x = 107,246.23

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1.5x scale

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.