Home / 86,128.48-118,860-52,143.20

Finding the Fourth Proportional to 86,128.48, 118,860 and 52,143.20

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Solution

The fourth proportional to 86,128.48, 118,860 and 52,143.20 is: 71,959.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,128.48 : 118,860 = 52,143.20 : x
  2. Step 2: Convert to fraction form
    86,128.48/118,860 = 52,143.20/x
  3. Step 3: Cross multiply
    86,128.48x = 118,860 × 52,143.20
  4. Step 4: Simplify right side
    86,128.48x = 6,197,740,752
  5. Step 5: Solve for x
    x = 6,197,740,752/86,128.48
  6. Step 6: Final answer
    x = 71,959.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.