Home / 78,065.11-107,729.63-42,255.03

Finding the Fourth Proportional to 78,065.11, 107,729.63 and 42,255.03

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Solution

The fourth proportional to 78,065.11, 107,729.63 and 42,255.03 is: 58,311.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,065.11 : 107,729.63 = 42,255.03 : x
  2. Step 2: Convert to fraction form
    78,065.11/107,729.63 = 42,255.03/x
  3. Step 3: Cross multiply
    78,065.11x = 107,729.63 × 42,255.03
  4. Step 4: Simplify right side
    78,065.11x = 4,552,118,536.26
  5. Step 5: Solve for x
    x = 4,552,118,536.26/78,065.11
  6. Step 6: Final answer
    x = 58,311.82

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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.