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Finding the Fourth Proportional to 139,713.60, 192,801.60 and 76,051.20

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Solution

The fourth proportional to 139,713.60, 192,801.60 and 76,051.20 is: 104,948.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,713.60 : 192,801.60 = 76,051.20 : x
  2. Step 2: Convert to fraction form
    139,713.60/192,801.60 = 76,051.20/x
  3. Step 3: Cross multiply
    139,713.60x = 192,801.60 × 76,051.20
  4. Step 4: Simplify right side
    139,713.60x = 14,662,793,041.92
  5. Step 5: Solve for x
    x = 14,662,793,041.92/139,713.60
  6. Step 6: Final answer
    x = 104,948.93

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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.