Home / 81,681.12-122,521.44-26,277.12

Finding the Fourth Proportional to 81,681.12, 122,521.44 and 26,277.12

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Solution

The fourth proportional to 81,681.12, 122,521.44 and 26,277.12 is: 39,415.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,681.12 : 122,521.44 = 26,277.12 : x
  2. Step 2: Convert to fraction form
    81,681.12/122,521.44 = 26,277.12/x
  3. Step 3: Cross multiply
    81,681.12x = 122,521.44 × 26,277.12
  4. Step 4: Simplify right side
    81,681.12x = 3,219,510,581.45
  5. Step 5: Solve for x
    x = 3,219,510,581.45/81,681.12
  6. Step 6: Final answer
    x = 39,415.60

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1.5x scale

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.