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Finding the Fourth Proportional to 81,980.81, 113,141.58 and 47,987.24

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Solution

The fourth proportional to 81,980.81, 113,141.58 and 47,987.24 is: 66,227.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,980.81 : 113,141.58 = 47,987.24 : x
  2. Step 2: Convert to fraction form
    81,980.81/113,141.58 = 47,987.24/x
  3. Step 3: Cross multiply
    81,980.81x = 113,141.58 × 47,987.24
  4. Step 4: Simplify right side
    81,980.81x = 5,429,351,812.67
  5. Step 5: Solve for x
    x = 5,429,351,812.67/81,980.81
  6. Step 6: Final answer
    x = 66,227.11

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1.5x scale

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.