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Finding the Fourth Proportional to 130,418.96, 179,978.90 and 76,706.24

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Solution

The fourth proportional to 130,418.96, 179,978.90 and 76,706.24 is: 105,855.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,418.96 : 179,978.90 = 76,706.24 : x
  2. Step 2: Convert to fraction form
    130,418.96/179,978.90 = 76,706.24/x
  3. Step 3: Cross multiply
    130,418.96x = 179,978.90 × 76,706.24
  4. Step 4: Simplify right side
    130,418.96x = 13,805,504,698.34
  5. Step 5: Solve for x
    x = 13,805,504,698.34/130,418.96
  6. Step 6: Final answer
    x = 105,855.04

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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.