Home / 137,730.88-190,099.36-87,420.48

Finding the Fourth Proportional to 137,730.88, 190,099.36 and 87,420.48

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Solution

The fourth proportional to 137,730.88, 190,099.36 and 87,420.48 is: 120,659.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,730.88 : 190,099.36 = 87,420.48 : x
  2. Step 2: Convert to fraction form
    137,730.88/190,099.36 = 87,420.48/x
  3. Step 3: Cross multiply
    137,730.88x = 190,099.36 × 87,420.48
  4. Step 4: Simplify right side
    137,730.88x = 16,618,577,298.89
  5. Step 5: Solve for x
    x = 16,618,577,298.89/137,730.88
  6. Step 6: Final answer
    x = 120,659.78

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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.