Home / 230,397.36-317,909.88-128,400.56

Finding the Fourth Proportional to 230,397.36, 317,909.88 and 128,400.56

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Solution

The fourth proportional to 230,397.36, 317,909.88 and 128,400.56 is: 177,171.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,397.36 : 317,909.88 = 128,400.56 : x
  2. Step 2: Convert to fraction form
    230,397.36/317,909.88 = 128,400.56/x
  3. Step 3: Cross multiply
    230,397.36x = 317,909.88 × 128,400.56
  4. Step 4: Simplify right side
    230,397.36x = 40,819,806,621.53
  5. Step 5: Solve for x
    x = 40,819,806,621.53/230,397.36
  6. Step 6: Final answer
    x = 177,171.33

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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.