Home / 128,430.18-192,684.06-38,475.81

Finding the Fourth Proportional to 128,430.18, 192,684.06 and 38,475.81

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Solution

The fourth proportional to 128,430.18, 192,684.06 and 38,475.81 is: 57,725.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,430.18 : 192,684.06 = 38,475.81 : x
  2. Step 2: Convert to fraction form
    128,430.18/192,684.06 = 38,475.81/x
  3. Step 3: Cross multiply
    128,430.18x = 192,684.06 × 38,475.81
  4. Step 4: Simplify right side
    128,430.18x = 7,413,675,282.59
  5. Step 5: Solve for x
    x = 7,413,675,282.59/128,430.18
  6. Step 6: Final answer
    x = 57,725.34

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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.