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Finding the Fourth Proportional to 139,553.76, 192,580.14 and 79,130.16

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Solution

The fourth proportional to 139,553.76, 192,580.14 and 79,130.16 is: 109,197.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,553.76 : 192,580.14 = 79,130.16 : x
  2. Step 2: Convert to fraction form
    139,553.76/192,580.14 = 79,130.16/x
  3. Step 3: Cross multiply
    139,553.76x = 192,580.14 × 79,130.16
  4. Step 4: Simplify right side
    139,553.76x = 15,238,897,291.02
  5. Step 5: Solve for x
    x = 15,238,897,291.02/139,553.76
  6. Step 6: Final answer
    x = 109,197.33

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1.5x scale

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.