Home / 114,905.70-172,358.55-85,381.20

Finding the Fourth Proportional to 114,905.70, 172,358.55 and 85,381.20

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Solution

The fourth proportional to 114,905.70, 172,358.55 and 85,381.20 is: 128,071.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,905.70 : 172,358.55 = 85,381.20 : x
  2. Step 2: Convert to fraction form
    114,905.70/172,358.55 = 85,381.20/x
  3. Step 3: Cross multiply
    114,905.70x = 172,358.55 × 85,381.20
  4. Step 4: Simplify right side
    114,905.70x = 14,716,179,829.26
  5. Step 5: Solve for x
    x = 14,716,179,829.26/114,905.70
  6. Step 6: Final answer
    x = 128,071.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.