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Finding the Fourth Proportional to 139,700.45, 192,823.70 and 86,030.46

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Solution

The fourth proportional to 139,700.45, 192,823.70 and 86,030.46 is: 118,744.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,700.45 : 192,823.70 = 86,030.46 : x
  2. Step 2: Convert to fraction form
    139,700.45/192,823.70 = 86,030.46/x
  3. Step 3: Cross multiply
    139,700.45x = 192,823.70 × 86,030.46
  4. Step 4: Simplify right side
    139,700.45x = 16,588,711,179.75
  5. Step 5: Solve for x
    x = 16,588,711,179.75/139,700.45
  6. Step 6: Final answer
    x = 118,744.87

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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.