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Finding the Fourth Proportional to 139,748, 192,855.66 and 76,089.26

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Solution

The fourth proportional to 139,748, 192,855.66 and 76,089.26 is: 105,005.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,748 : 192,855.66 = 76,089.26 : x
  2. Step 2: Convert to fraction form
    139,748/192,855.66 = 76,089.26/x
  3. Step 3: Cross multiply
    139,748x = 192,855.66 × 76,089.26
  4. Step 4: Simplify right side
    139,748x = 14,674,244,456.21
  5. Step 5: Solve for x
    x = 14,674,244,456.21/139,748
  6. Step 6: Final answer
    x = 105,005.04

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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.