Home / 128,710.36-192,975.92-56,628.36

Finding the Fourth Proportional to 128,710.36, 192,975.92 and 56,628.36

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Solution

The fourth proportional to 128,710.36, 192,975.92 and 56,628.36 is: 84,903.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,710.36 : 192,975.92 = 56,628.36 : x
  2. Step 2: Convert to fraction form
    128,710.36/192,975.92 = 56,628.36/x
  3. Step 3: Cross multiply
    128,710.36x = 192,975.92 × 56,628.36
  4. Step 4: Simplify right side
    128,710.36x = 10,927,909,869.09
  5. Step 5: Solve for x
    x = 10,927,909,869.09/128,710.36
  6. Step 6: Final answer
    x = 84,903.11

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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.