Home / 128,534.10-192,729.63-39,762.90

Finding the Fourth Proportional to 128,534.10, 192,729.63 and 39,762.90

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Solution

The fourth proportional to 128,534.10, 192,729.63 and 39,762.90 is: 59,622.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,534.10 : 192,729.63 = 39,762.90 : x
  2. Step 2: Convert to fraction form
    128,534.10/192,729.63 = 39,762.90/x
  3. Step 3: Cross multiply
    128,534.10x = 192,729.63 × 39,762.90
  4. Step 4: Simplify right side
    128,534.10x = 7,663,489,004.73
  5. Step 5: Solve for x
    x = 7,663,489,004.73/128,534.10
  6. Step 6: Final answer
    x = 59,622.22

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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.