Home / 129,164.10-178,240.88-71,803.30

Finding the Fourth Proportional to 129,164.10, 178,240.88 and 71,803.30

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Solution

The fourth proportional to 129,164.10, 178,240.88 and 71,803.30 is: 99,085.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,164.10 : 178,240.88 = 71,803.30 : x
  2. Step 2: Convert to fraction form
    129,164.10/178,240.88 = 71,803.30/x
  3. Step 3: Cross multiply
    129,164.10x = 178,240.88 × 71,803.30
  4. Step 4: Simplify right side
    129,164.10x = 12,798,283,378.90
  5. Step 5: Solve for x
    x = 12,798,283,378.90/129,164.10
  6. Step 6: Final answer
    x = 99,085.45

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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.