Home / 99,631.04-149,280.44-81,916.32

Finding the Fourth Proportional to 99,631.04, 149,280.44 and 81,916.32

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Solution

The fourth proportional to 99,631.04, 149,280.44 and 81,916.32 is: 122,737.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,631.04 : 149,280.44 = 81,916.32 : x
  2. Step 2: Convert to fraction form
    99,631.04/149,280.44 = 81,916.32/x
  3. Step 3: Cross multiply
    99,631.04x = 149,280.44 × 81,916.32
  4. Step 4: Simplify right side
    99,631.04x = 12,228,504,292.78
  5. Step 5: Solve for x
    x = 12,228,504,292.78/99,631.04
  6. Step 6: Final answer
    x = 122,737.90

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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.