Home / 77,158.22-115,548.58-69,678.68

Finding the Fourth Proportional to 77,158.22, 115,548.58 and 69,678.68

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Solution

The fourth proportional to 77,158.22, 115,548.58 and 69,678.68 is: 104,347.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,158.22 : 115,548.58 = 69,678.68 : x
  2. Step 2: Convert to fraction form
    77,158.22/115,548.58 = 69,678.68/x
  3. Step 3: Cross multiply
    77,158.22x = 115,548.58 × 69,678.68
  4. Step 4: Simplify right side
    77,158.22x = 8,051,272,530.27
  5. Step 5: Solve for x
    x = 8,051,272,530.27/77,158.22
  6. Step 6: Final answer
    x = 104,347.57

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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.