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Finding the Fourth Proportional to 81,261.99, 112,139.51 and 45,453.51

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Solution

The fourth proportional to 81,261.99, 112,139.51 and 45,453.51 is: 62,724.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,261.99 : 112,139.51 = 45,453.51 : x
  2. Step 2: Convert to fraction form
    81,261.99/112,139.51 = 45,453.51/x
  3. Step 3: Cross multiply
    81,261.99x = 112,139.51 × 45,453.51
  4. Step 4: Simplify right side
    81,261.99x = 5,097,134,111.91
  5. Step 5: Solve for x
    x = 5,097,134,111.91/81,261.99
  6. Step 6: Final answer
    x = 62,724.70

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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.