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Finding the Fourth Proportional to 102,113.81, 140,915.81 and 57,401.81

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Solution

The fourth proportional to 102,113.81, 140,915.81 and 57,401.81 is: 79,213.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,113.81 : 140,915.81 = 57,401.81 : x
  2. Step 2: Convert to fraction form
    102,113.81/140,915.81 = 57,401.81/x
  3. Step 3: Cross multiply
    102,113.81x = 140,915.81 × 57,401.81
  4. Step 4: Simplify right side
    102,113.81x = 8,088,822,264.61
  5. Step 5: Solve for x
    x = 8,088,822,264.61/102,113.81
  6. Step 6: Final answer
    x = 79,213.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.