Home / 85,719.98-128,610.22-38,330.66

Finding the Fourth Proportional to 85,719.98, 128,610.22 and 38,330.66

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Solution

The fourth proportional to 85,719.98, 128,610.22 and 38,330.66 is: 57,509.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,719.98 : 128,610.22 = 38,330.66 : x
  2. Step 2: Convert to fraction form
    85,719.98/128,610.22 = 38,330.66/x
  3. Step 3: Cross multiply
    85,719.98x = 128,610.22 × 38,330.66
  4. Step 4: Simplify right side
    85,719.98x = 4,929,714,615.35
  5. Step 5: Solve for x
    x = 4,929,714,615.35/85,719.98
  6. Step 6: Final answer
    x = 57,509.52

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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.