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Finding the Fourth Proportional to 81,515.81, 112,491.80 and 45,705.82

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Solution

The fourth proportional to 81,515.81, 112,491.80 and 45,705.82 is: 63,074.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,515.81 : 112,491.80 = 45,705.82 : x
  2. Step 2: Convert to fraction form
    81,515.81/112,491.80 = 45,705.82/x
  3. Step 3: Cross multiply
    81,515.81x = 112,491.80 × 45,705.82
  4. Step 4: Simplify right side
    81,515.81x = 5,141,529,962.28
  5. Step 5: Solve for x
    x = 5,141,529,962.28/81,515.81
  6. Step 6: Final answer
    x = 63,074.02

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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.