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Finding the Fourth Proportional to 61,056.92, 91,595.78 and 21,065.06

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Solution

The fourth proportional to 61,056.92, 91,595.78 and 21,065.06 is: 31,601.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,056.92 : 91,595.78 = 21,065.06 : x
  2. Step 2: Convert to fraction form
    61,056.92/91,595.78 = 21,065.06/x
  3. Step 3: Cross multiply
    61,056.92x = 91,595.78 × 21,065.06
  4. Step 4: Simplify right side
    61,056.92x = 1,929,470,725.11
  5. Step 5: Solve for x
    x = 1,929,470,725.11/61,056.92
  6. Step 6: Final answer
    x = 31,601.18

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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.