Home / 128,914.87-177,913.23-71,559.58

Finding the Fourth Proportional to 128,914.87, 177,913.23 and 71,559.58

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Solution

The fourth proportional to 128,914.87, 177,913.23 and 71,559.58 is: 98,758.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,914.87 : 177,913.23 = 71,559.58 : x
  2. Step 2: Convert to fraction form
    128,914.87/177,913.23 = 71,559.58/x
  3. Step 3: Cross multiply
    128,914.87x = 177,913.23 × 71,559.58
  4. Step 4: Simplify right side
    128,914.87x = 12,731,395,125.68
  5. Step 5: Solve for x
    x = 12,731,395,125.68/128,914.87
  6. Step 6: Final answer
    x = 98,758.16

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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.