Home / 107,985.19-161,851.64-81,245.25

Finding the Fourth Proportional to 107,985.19, 161,851.64 and 81,245.25

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Solution

The fourth proportional to 107,985.19, 161,851.64 and 81,245.25 is: 121,772.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,985.19 : 161,851.64 = 81,245.25 : x
  2. Step 2: Convert to fraction form
    107,985.19/161,851.64 = 81,245.25/x
  3. Step 3: Cross multiply
    107,985.19x = 161,851.64 × 81,245.25
  4. Step 4: Simplify right side
    107,985.19x = 13,149,677,689.20
  5. Step 5: Solve for x
    x = 13,149,677,689.20/107,985.19
  6. Step 6: Final answer
    x = 121,772.98

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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.