Home / 128,570.90-192,887.14-53,649.36

Finding the Fourth Proportional to 128,570.90, 192,887.14 and 53,649.36

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Solution

The fourth proportional to 128,570.90, 192,887.14 and 53,649.36 is: 80,486.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,570.90 : 192,887.14 = 53,649.36 : x
  2. Step 2: Convert to fraction form
    128,570.90/192,887.14 = 53,649.36/x
  3. Step 3: Cross multiply
    128,570.90x = 192,887.14 × 53,649.36
  4. Step 4: Simplify right side
    128,570.90x = 10,348,271,613.23
  5. Step 5: Solve for x
    x = 10,348,271,613.23/128,570.90
  6. Step 6: Final answer
    x = 80,486.89

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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.