Home / 138,415.04-207,457.12-79,291.20

Finding the Fourth Proportional to 138,415.04, 207,457.12 and 79,291.20

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Solution

The fourth proportional to 138,415.04, 207,457.12 and 79,291.20 is: 118,842.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,415.04 : 207,457.12 = 79,291.20 : x
  2. Step 2: Convert to fraction form
    138,415.04/207,457.12 = 79,291.20/x
  3. Step 3: Cross multiply
    138,415.04x = 207,457.12 × 79,291.20
  4. Step 4: Simplify right side
    138,415.04x = 16,449,523,993.34
  5. Step 5: Solve for x
    x = 16,449,523,993.34/138,415.04
  6. Step 6: Final answer
    x = 118,842.03

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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.