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Finding the Fourth Proportional to 230,290.80, 317,796.51 and 128,315.85

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Solution

The fourth proportional to 230,290.80, 317,796.51 and 128,315.85 is: 177,073.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,290.80 : 317,796.51 = 128,315.85 : x
  2. Step 2: Convert to fraction form
    230,290.80/317,796.51 = 128,315.85/x
  3. Step 3: Cross multiply
    230,290.80x = 317,796.51 × 128,315.85
  4. Step 4: Simplify right side
    230,290.80x = 40,778,329,307.68
  5. Step 5: Solve for x
    x = 40,778,329,307.68/230,290.80
  6. Step 6: Final answer
    x = 177,073.20

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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.