Home / 209,669.76-289,322.28-122,457.60

Finding the Fourth Proportional to 209,669.76, 289,322.28 and 122,457.60

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Solution

The fourth proportional to 209,669.76, 289,322.28 and 122,457.60 is: 168,978.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,669.76 : 289,322.28 = 122,457.60 : x
  2. Step 2: Convert to fraction form
    209,669.76/289,322.28 = 122,457.60/x
  3. Step 3: Cross multiply
    209,669.76x = 289,322.28 × 122,457.60
  4. Step 4: Simplify right side
    209,669.76x = 35,429,712,035.33
  5. Step 5: Solve for x
    x = 35,429,712,035.33/209,669.76
  6. Step 6: Final answer
    x = 168,978.65

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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.