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Finding the Fourth Proportional to 139,740.76, 192,843.04 and 76,078.40

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Solution

The fourth proportional to 139,740.76, 192,843.04 and 76,078.40 is: 104,988.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,740.76 : 192,843.04 = 76,078.40 : x
  2. Step 2: Convert to fraction form
    139,740.76/192,843.04 = 76,078.40/x
  3. Step 3: Cross multiply
    139,740.76x = 192,843.04 × 76,078.40
  4. Step 4: Simplify right side
    139,740.76x = 14,671,189,934.34
  5. Step 5: Solve for x
    x = 14,671,189,934.34/139,740.76
  6. Step 6: Final answer
    x = 104,988.62

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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.