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Finding the Fourth Proportional to 264,008.60, 395,915.70 and 86,521.40

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Solution

The fourth proportional to 264,008.60, 395,915.70 and 86,521.40 is: 129,750.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    264,008.60 : 395,915.70 = 86,521.40 : x
  2. Step 2: Convert to fraction form
    264,008.60/395,915.70 = 86,521.40/x
  3. Step 3: Cross multiply
    264,008.60x = 395,915.70 × 86,521.40
  4. Step 4: Simplify right side
    264,008.60x = 34,255,180,645.98
  5. Step 5: Solve for x
    x = 34,255,180,645.98/264,008.60
  6. Step 6: Final answer
    x = 129,750.25

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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.