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Finding the Fourth Proportional to 146,138.50, 201,671.13 and 79,070.50

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Solution

The fourth proportional to 146,138.50, 201,671.13 and 79,070.50 is: 109,117.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    146,138.50 : 201,671.13 = 79,070.50 : x
  2. Step 2: Convert to fraction form
    146,138.50/201,671.13 = 79,070.50/x
  3. Step 3: Cross multiply
    146,138.50x = 201,671.13 × 79,070.50
  4. Step 4: Simplify right side
    146,138.50x = 15,946,237,084.67
  5. Step 5: Solve for x
    x = 15,946,237,084.67/146,138.50
  6. Step 6: Final answer
    x = 109,117.29

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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.