Home / 84,823.04-127,830.32-76,400.12

Finding the Fourth Proportional to 84,823.04, 127,830.32 and 76,400.12

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Solution

The fourth proportional to 84,823.04, 127,830.32 and 76,400.12 is: 115,136.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,823.04 : 127,830.32 = 76,400.12 : x
  2. Step 2: Convert to fraction form
    84,823.04/127,830.32 = 76,400.12/x
  3. Step 3: Cross multiply
    84,823.04x = 127,830.32 × 76,400.12
  4. Step 4: Simplify right side
    84,823.04x = 9,766,251,787.64
  5. Step 5: Solve for x
    x = 9,766,251,787.64/84,823.04
  6. Step 6: Final answer
    x = 115,136.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.