Home / 139,987.46-193,179.20-76,326.50

Finding the Fourth Proportional to 139,987.46, 193,179.20 and 76,326.50

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Solution

The fourth proportional to 139,987.46, 193,179.20 and 76,326.50 is: 105,328.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,987.46 : 193,179.20 = 76,326.50 : x
  2. Step 2: Convert to fraction form
    139,987.46/193,179.20 = 76,326.50/x
  3. Step 3: Cross multiply
    139,987.46x = 193,179.20 × 76,326.50
  4. Step 4: Simplify right side
    139,987.46x = 14,744,692,208.80
  5. Step 5: Solve for x
    x = 14,744,692,208.80/139,987.46
  6. Step 6: Final answer
    x = 105,328.66

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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.