Home / 128,406.24-192,538.80-39,635.28

Finding the Fourth Proportional to 128,406.24, 192,538.80 and 39,635.28

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Solution

The fourth proportional to 128,406.24, 192,538.80 and 39,635.28 is: 59,431.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,406.24 : 192,538.80 = 39,635.28 : x
  2. Step 2: Convert to fraction form
    128,406.24/192,538.80 = 39,635.28/x
  3. Step 3: Cross multiply
    128,406.24x = 192,538.80 × 39,635.28
  4. Step 4: Simplify right side
    128,406.24x = 7,631,329,248.86
  5. Step 5: Solve for x
    x = 7,631,329,248.86/128,406.24
  6. Step 6: Final answer
    x = 59,431.14

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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.