Home / 137,009.12-189,130.88-83,311.38

Finding the Fourth Proportional to 137,009.12, 189,130.88 and 83,311.38

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Solution

The fourth proportional to 137,009.12, 189,130.88 and 83,311.38 is: 115,005.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,009.12 : 189,130.88 = 83,311.38 : x
  2. Step 2: Convert to fraction form
    137,009.12/189,130.88 = 83,311.38/x
  3. Step 3: Cross multiply
    137,009.12x = 189,130.88 × 83,311.38
  4. Step 4: Simplify right side
    137,009.12x = 15,756,754,613.41
  5. Step 5: Solve for x
    x = 15,756,754,613.41/137,009.12
  6. Step 6: Final answer
    x = 115,005.15

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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.