Home / 145,340.20-217,722.30-128,021.80

Finding the Fourth Proportional to 145,340.20, 217,722.30 and 128,021.80

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Solution

The fourth proportional to 145,340.20, 217,722.30 and 128,021.80 is: 191,779.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,340.20 : 217,722.30 = 128,021.80 : x
  2. Step 2: Convert to fraction form
    145,340.20/217,722.30 = 128,021.80/x
  3. Step 3: Cross multiply
    145,340.20x = 217,722.30 × 128,021.80
  4. Step 4: Simplify right side
    145,340.20x = 27,873,200,746.14
  5. Step 5: Solve for x
    x = 27,873,200,746.14/145,340.20
  6. Step 6: Final answer
    x = 191,779.02

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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.