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Finding the Fourth Proportional to 103,390.58, 142,679.03 and 58,068.62

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Solution

The fourth proportional to 103,390.58, 142,679.03 and 58,068.62 is: 80,134.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,390.58 : 142,679.03 = 58,068.62 : x
  2. Step 2: Convert to fraction form
    103,390.58/142,679.03 = 58,068.62/x
  3. Step 3: Cross multiply
    103,390.58x = 142,679.03 × 58,068.62
  4. Step 4: Simplify right side
    103,390.58x = 8,285,174,441.39
  5. Step 5: Solve for x
    x = 8,285,174,441.39/103,390.58
  6. Step 6: Final answer
    x = 80,134.72

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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.