Home / 148,940.64-205,532.88-81,872.16

Finding the Fourth Proportional to 148,940.64, 205,532.88 and 81,872.16

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Solution

The fourth proportional to 148,940.64, 205,532.88 and 81,872.16 is: 112,980.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,940.64 : 205,532.88 = 81,872.16 : x
  2. Step 2: Convert to fraction form
    148,940.64/205,532.88 = 81,872.16/x
  3. Step 3: Cross multiply
    148,940.64x = 205,532.88 × 81,872.16
  4. Step 4: Simplify right side
    148,940.64x = 16,827,420,836.62
  5. Step 5: Solve for x
    x = 16,827,420,836.62/148,940.64
  6. Step 6: Final answer
    x = 112,980.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.