Home / 109,829.25-164,878.53-72,420.60

Finding the Fourth Proportional to 109,829.25, 164,878.53 and 72,420.60

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Solution

The fourth proportional to 109,829.25, 164,878.53 and 72,420.60 is: 108,719.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,829.25 : 164,878.53 = 72,420.60 : x
  2. Step 2: Convert to fraction form
    109,829.25/164,878.53 = 72,420.60/x
  3. Step 3: Cross multiply
    109,829.25x = 164,878.53 × 72,420.60
  4. Step 4: Simplify right side
    109,829.25x = 11,940,602,069.72
  5. Step 5: Solve for x
    x = 11,940,602,069.72/109,829.25
  6. Step 6: Final answer
    x = 108,719.69

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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.