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Finding the Fourth Proportional to 186,640.80, 279,305.10 and 130,216.20

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Solution

The fourth proportional to 186,640.80, 279,305.10 and 130,216.20 is: 194,866.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,640.80 : 279,305.10 = 130,216.20 : x
  2. Step 2: Convert to fraction form
    186,640.80/279,305.10 = 130,216.20/x
  3. Step 3: Cross multiply
    186,640.80x = 279,305.10 × 130,216.20
  4. Step 4: Simplify right side
    186,640.80x = 36,370,048,762.62
  5. Step 5: Solve for x
    x = 36,370,048,762.62/186,640.80
  6. Step 6: Final answer
    x = 194,866.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.