Home / 128,505.23-177,417.72-82,583.50

Finding the Fourth Proportional to 128,505.23, 177,417.72 and 82,583.50

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Solution

The fourth proportional to 128,505.23, 177,417.72 and 82,583.50 is: 114,016.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,505.23 : 177,417.72 = 82,583.50 : x
  2. Step 2: Convert to fraction form
    128,505.23/177,417.72 = 82,583.50/x
  3. Step 3: Cross multiply
    128,505.23x = 177,417.72 × 82,583.50
  4. Step 4: Simplify right side
    128,505.23x = 14,651,776,279.62
  5. Step 5: Solve for x
    x = 14,651,776,279.62/128,505.23
  6. Step 6: Final answer
    x = 114,016.96

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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.