Home / 137,118.28-189,222.69-76,688.68

Finding the Fourth Proportional to 137,118.28, 189,222.69 and 76,688.68

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Solution

The fourth proportional to 137,118.28, 189,222.69 and 76,688.68 is: 105,830.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,118.28 : 189,222.69 = 76,688.68 : x
  2. Step 2: Convert to fraction form
    137,118.28/189,222.69 = 76,688.68/x
  3. Step 3: Cross multiply
    137,118.28x = 189,222.69 × 76,688.68
  4. Step 4: Simplify right side
    137,118.28x = 14,511,238,322.15
  5. Step 5: Solve for x
    x = 14,511,238,322.15/137,118.28
  6. Step 6: Final answer
    x = 105,830.08

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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.