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Finding the Fourth Proportional to 100,976.58, 139,308.93 and 60,700.14

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Solution

The fourth proportional to 100,976.58, 139,308.93 and 60,700.14 is: 83,742.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,976.58 : 139,308.93 = 60,700.14 : x
  2. Step 2: Convert to fraction form
    100,976.58/139,308.93 = 60,700.14/x
  3. Step 3: Cross multiply
    100,976.58x = 139,308.93 × 60,700.14
  4. Step 4: Simplify right side
    100,976.58x = 8,456,071,554.25
  5. Step 5: Solve for x
    x = 8,456,071,554.25/100,976.58
  6. Step 6: Final answer
    x = 83,742.90

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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.