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Finding the Fourth Proportional to 139,354.02, 192,313.44 and 78,926.40

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Solution

The fourth proportional to 139,354.02, 192,313.44 and 78,926.40 is: 108,921.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,354.02 : 192,313.44 = 78,926.40 : x
  2. Step 2: Convert to fraction form
    139,354.02/192,313.44 = 78,926.40/x
  3. Step 3: Cross multiply
    139,354.02x = 192,313.44 × 78,926.40
  4. Step 4: Simplify right side
    139,354.02x = 15,178,607,490.82
  5. Step 5: Solve for x
    x = 15,178,607,490.82/139,354.02
  6. Step 6: Final answer
    x = 108,921.20

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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.