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Finding the Fourth Proportional to 139,129.40, 191,924.52 and 84,698.12

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Solution

The fourth proportional to 139,129.40, 191,924.52 and 84,698.12 is: 116,838.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,129.40 : 191,924.52 = 84,698.12 : x
  2. Step 2: Convert to fraction form
    139,129.40/191,924.52 = 84,698.12/x
  3. Step 3: Cross multiply
    139,129.40x = 191,924.52 × 84,698.12
  4. Step 4: Simplify right side
    139,129.40x = 16,255,646,025.90
  5. Step 5: Solve for x
    x = 16,255,646,025.90/139,129.40
  6. Step 6: Final answer
    x = 116,838.32

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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.