Home / 129,588.55-178,771.08-75,840.28

Finding the Fourth Proportional to 129,588.55, 178,771.08 and 75,840.28

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Solution

The fourth proportional to 129,588.55, 178,771.08 and 75,840.28 is: 104,623.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,588.55 : 178,771.08 = 75,840.28 : x
  2. Step 2: Convert to fraction form
    129,588.55/178,771.08 = 75,840.28/x
  3. Step 3: Cross multiply
    129,588.55x = 178,771.08 × 75,840.28
  4. Step 4: Simplify right side
    129,588.55x = 13,558,048,763.10
  5. Step 5: Solve for x
    x = 13,558,048,763.10/129,588.55
  6. Step 6: Final answer
    x = 104,623.82

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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.