Home / 129,371.80-178,528.44-72,009.22

Finding the Fourth Proportional to 129,371.80, 178,528.44 and 72,009.22

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Solution

The fourth proportional to 129,371.80, 178,528.44 and 72,009.22 is: 99,370.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,371.80 : 178,528.44 = 72,009.22 : x
  2. Step 2: Convert to fraction form
    129,371.80/178,528.44 = 72,009.22/x
  3. Step 3: Cross multiply
    129,371.80x = 178,528.44 × 72,009.22
  4. Step 4: Simplify right side
    129,371.80x = 12,855,693,712.22
  5. Step 5: Solve for x
    x = 12,855,693,712.22/129,371.80
  6. Step 6: Final answer
    x = 99,370.14

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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.