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Finding the Fourth Proportional to 91,465.60, 136,929.60 and 68,195.20

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Solution

The fourth proportional to 91,465.60, 136,929.60 and 68,195.20 is: 102,092.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,465.60 : 136,929.60 = 68,195.20 : x
  2. Step 2: Convert to fraction form
    91,465.60/136,929.60 = 68,195.20/x
  3. Step 3: Cross multiply
    91,465.60x = 136,929.60 × 68,195.20
  4. Step 4: Simplify right side
    91,465.60x = 9,337,941,457.92
  5. Step 5: Solve for x
    x = 9,337,941,457.92/91,465.60
  6. Step 6: Final answer
    x = 102,092.39

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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.