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Finding the Fourth Proportional to 102,168.71, 140,917.41 and 70,347.86

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Solution

The fourth proportional to 102,168.71, 140,917.41 and 70,347.86 is: 97,028.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,168.71 : 140,917.41 = 70,347.86 : x
  2. Step 2: Convert to fraction form
    102,168.71/140,917.41 = 70,347.86/x
  3. Step 3: Cross multiply
    102,168.71x = 140,917.41 × 70,347.86
  4. Step 4: Simplify right side
    102,168.71x = 9,913,237,525.66
  5. Step 5: Solve for x
    x = 9,913,237,525.66/102,168.71
  6. Step 6: Final answer
    x = 97,028.12

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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.