Home / 137,140.78-189,269.98-76,726.73

Finding the Fourth Proportional to 137,140.78, 189,269.98 and 76,726.73

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Solution

The fourth proportional to 137,140.78, 189,269.98 and 76,726.73 is: 105,891.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,140.78 : 189,269.98 = 76,726.73 : x
  2. Step 2: Convert to fraction form
    137,140.78/189,269.98 = 76,726.73/x
  3. Step 3: Cross multiply
    137,140.78x = 189,269.98 × 76,726.73
  4. Step 4: Simplify right side
    137,140.78x = 14,522,066,652.57
  5. Step 5: Solve for x
    x = 14,522,066,652.57/137,140.78
  6. Step 6: Final answer
    x = 105,891.67

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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.