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Finding the Fourth Proportional to 86,852.40, 130,059.90 and 82,915.80

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Solution

The fourth proportional to 86,852.40, 130,059.90 and 82,915.80 is: 124,164.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,852.40 : 130,059.90 = 82,915.80 : x
  2. Step 2: Convert to fraction form
    86,852.40/130,059.90 = 82,915.80/x
  3. Step 3: Cross multiply
    86,852.40x = 130,059.90 × 82,915.80
  4. Step 4: Simplify right side
    86,852.40x = 10,784,020,656.42
  5. Step 5: Solve for x
    x = 10,784,020,656.42/86,852.40
  6. Step 6: Final answer
    x = 124,164.91

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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.