Home / 129,988.02-179,365.69-72,620.28

Finding the Fourth Proportional to 129,988.02, 179,365.69 and 72,620.28

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Solution

The fourth proportional to 129,988.02, 179,365.69 and 72,620.28 is: 100,206.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,988.02 : 179,365.69 = 72,620.28 : x
  2. Step 2: Convert to fraction form
    129,988.02/179,365.69 = 72,620.28/x
  3. Step 3: Cross multiply
    129,988.02x = 179,365.69 × 72,620.28
  4. Step 4: Simplify right side
    129,988.02x = 13,025,586,720.97
  5. Step 5: Solve for x
    x = 13,025,586,720.97/129,988.02
  6. Step 6: Final answer
    x = 100,206.05

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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.