Home / 102,905.12-142,008.72-59,890.88

Finding the Fourth Proportional to 102,905.12, 142,008.72 and 59,890.88

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Solution

The fourth proportional to 102,905.12, 142,008.72 and 59,890.88 is: 82,649.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,905.12 : 142,008.72 = 59,890.88 : x
  2. Step 2: Convert to fraction form
    102,905.12/142,008.72 = 59,890.88/x
  3. Step 3: Cross multiply
    102,905.12x = 142,008.72 × 59,890.88
  4. Step 4: Simplify right side
    102,905.12x = 8,505,027,208.47
  5. Step 5: Solve for x
    x = 8,505,027,208.47/102,905.12
  6. Step 6: Final answer
    x = 82,649.21

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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.