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Finding the Fourth Proportional to 103,991.21, 156,018.15 and 43,988.81

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Solution

The fourth proportional to 103,991.21, 156,018.15 and 43,988.81 is: 65,996.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,991.21 : 156,018.15 = 43,988.81 : x
  2. Step 2: Convert to fraction form
    103,991.21/156,018.15 = 43,988.81/x
  3. Step 3: Cross multiply
    103,991.21x = 156,018.15 × 43,988.81
  4. Step 4: Simplify right side
    103,991.21x = 6,863,053,166.71
  5. Step 5: Solve for x
    x = 6,863,053,166.71/103,991.21
  6. Step 6: Final answer
    x = 65,996.47

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1.5x scale

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.