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Finding the Fourth Proportional to 230,300.80, 317,810.31 and 128,325.85

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Solution

The fourth proportional to 230,300.80, 317,810.31 and 128,325.85 is: 177,087.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,300.80 : 317,810.31 = 128,325.85 : x
  2. Step 2: Convert to fraction form
    230,300.80/317,810.31 = 128,325.85/x
  3. Step 3: Cross multiply
    230,300.80x = 317,810.31 × 128,325.85
  4. Step 4: Simplify right side
    230,300.80x = 40,783,276,580.46
  5. Step 5: Solve for x
    x = 40,783,276,580.46/230,300.80
  6. Step 6: Final answer
    x = 177,087.00

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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.