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Finding the Fourth Proportional to 84,915.10, 127,384.80 and 25,755.40

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Solution

The fourth proportional to 84,915.10, 127,384.80 and 25,755.40 is: 38,636.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,915.10 : 127,384.80 = 25,755.40 : x
  2. Step 2: Convert to fraction form
    84,915.10/127,384.80 = 25,755.40/x
  3. Step 3: Cross multiply
    84,915.10x = 127,384.80 × 25,755.40
  4. Step 4: Simplify right side
    84,915.10x = 3,280,846,477.92
  5. Step 5: Solve for x
    x = 3,280,846,477.92/84,915.10
  6. Step 6: Final answer
    x = 38,636.79

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1.5x scale

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.