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Finding the Fourth Proportional to 103,986.70, 155,688.45 and 101,070.70

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Solution

The fourth proportional to 103,986.70, 155,688.45 and 101,070.70 is: 151,322.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,986.70 : 155,688.45 = 101,070.70 : x
  2. Step 2: Convert to fraction form
    103,986.70/155,688.45 = 101,070.70/x
  3. Step 3: Cross multiply
    103,986.70x = 155,688.45 × 101,070.70
  4. Step 4: Simplify right side
    103,986.70x = 15,735,540,623.42
  5. Step 5: Solve for x
    x = 15,735,540,623.42/103,986.70
  6. Step 6: Final answer
    x = 151,322.63

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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.