Home / 137,985.85-190,418.20-76,729.60

Finding the Fourth Proportional to 137,985.85, 190,418.20 and 76,729.60

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Solution

The fourth proportional to 137,985.85, 190,418.20 and 76,729.60 is: 105,885.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,985.85 : 190,418.20 = 76,729.60 : x
  2. Step 2: Convert to fraction form
    137,985.85/190,418.20 = 76,729.60/x
  3. Step 3: Cross multiply
    137,985.85x = 190,418.20 × 76,729.60
  4. Step 4: Simplify right side
    137,985.85x = 14,610,712,318.72
  5. Step 5: Solve for x
    x = 14,610,712,318.72/137,985.85
  6. Step 6: Final answer
    x = 105,885.58

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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.