Home / 139,929.26-209,914.65-45,128.28

Finding the Fourth Proportional to 139,929.26, 209,914.65 and 45,128.28

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Solution

The fourth proportional to 139,929.26, 209,914.65 and 45,128.28 is: 67,699.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,929.26 : 209,914.65 = 45,128.28 : x
  2. Step 2: Convert to fraction form
    139,929.26/209,914.65 = 45,128.28/x
  3. Step 3: Cross multiply
    139,929.26x = 209,914.65 × 45,128.28
  4. Step 4: Simplify right side
    139,929.26x = 9,473,087,101.30
  5. Step 5: Solve for x
    x = 9,473,087,101.30/139,929.26
  6. Step 6: Final answer
    x = 67,699.11

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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.