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Finding the Fourth Proportional to 91,214.48, 136,889.44 and 69,055.76

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Solution

The fourth proportional to 91,214.48, 136,889.44 and 69,055.76 is: 103,634.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,214.48 : 136,889.44 = 69,055.76 : x
  2. Step 2: Convert to fraction form
    91,214.48/136,889.44 = 69,055.76/x
  3. Step 3: Cross multiply
    91,214.48x = 136,889.44 × 69,055.76
  4. Step 4: Simplify right side
    91,214.48x = 9,453,004,315.17
  5. Step 5: Solve for x
    x = 9,453,004,315.17/91,214.48
  6. Step 6: Final answer
    x = 103,634.91

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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.