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Finding the Fourth Proportional to 86,625.84, 129,915.76 and 34,035.76

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Solution

The fourth proportional to 86,625.84, 129,915.76 and 34,035.76 is: 51,044.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,625.84 : 129,915.76 = 34,035.76 : x
  2. Step 2: Convert to fraction form
    86,625.84/129,915.76 = 34,035.76/x
  3. Step 3: Cross multiply
    86,625.84x = 129,915.76 × 34,035.76
  4. Step 4: Simplify right side
    86,625.84x = 4,421,781,627.58
  5. Step 5: Solve for x
    x = 4,421,781,627.58/86,625.84
  6. Step 6: Final answer
    x = 51,044.60

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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.