Home / 90,916.60-136,246.90-72,228.60

Finding the Fourth Proportional to 90,916.60, 136,246.90 and 72,228.60

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Solution

The fourth proportional to 90,916.60, 136,246.90 and 72,228.60 is: 108,241.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,916.60 : 136,246.90 = 72,228.60 : x
  2. Step 2: Convert to fraction form
    90,916.60/136,246.90 = 72,228.60/x
  3. Step 3: Cross multiply
    90,916.60x = 136,246.90 × 72,228.60
  4. Step 4: Simplify right side
    90,916.60x = 9,840,922,841.34
  5. Step 5: Solve for x
    x = 9,840,922,841.34/90,916.60
  6. Step 6: Final answer
    x = 108,241.21

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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.