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Finding the Fourth Proportional to 81,585.87, 112,586.76 and 45,285.21

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Solution

The fourth proportional to 81,585.87, 112,586.76 and 45,285.21 is: 62,492.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,585.87 : 112,586.76 = 45,285.21 : x
  2. Step 2: Convert to fraction form
    81,585.87/112,586.76 = 45,285.21/x
  3. Step 3: Cross multiply
    81,585.87x = 112,586.76 × 45,285.21
  4. Step 4: Simplify right side
    81,585.87x = 5,098,515,069.82
  5. Step 5: Solve for x
    x = 5,098,515,069.82/81,585.87
  6. Step 6: Final answer
    x = 62,492.63

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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.