Home / 85,838.20-128,714.10-50,788.60

Finding the Fourth Proportional to 85,838.20, 128,714.10 and 50,788.60

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Solution

The fourth proportional to 85,838.20, 128,714.10 and 50,788.60 is: 76,157.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,838.20 : 128,714.10 = 50,788.60 : x
  2. Step 2: Convert to fraction form
    85,838.20/128,714.10 = 50,788.60/x
  3. Step 3: Cross multiply
    85,838.20x = 128,714.10 × 50,788.60
  4. Step 4: Simplify right side
    85,838.20x = 6,537,208,939.26
  5. Step 5: Solve for x
    x = 6,537,208,939.26/85,838.20
  6. Step 6: Final answer
    x = 76,157.34

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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.