Home / 128,538.36-192,807.90-75,875.40

Finding the Fourth Proportional to 128,538.36, 192,807.90 and 75,875.40

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Solution

The fourth proportional to 128,538.36, 192,807.90 and 75,875.40 is: 113,813.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,538.36 : 192,807.90 = 75,875.40 : x
  2. Step 2: Convert to fraction form
    128,538.36/192,807.90 = 75,875.40/x
  3. Step 3: Cross multiply
    128,538.36x = 192,807.90 × 75,875.40
  4. Step 4: Simplify right side
    128,538.36x = 14,629,376,535.66
  5. Step 5: Solve for x
    x = 14,629,376,535.66/128,538.36
  6. Step 6: Final answer
    x = 113,813.31

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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.