Home / 156,768.48-216,342.09-85,149.90

Finding the Fourth Proportional to 156,768.48, 216,342.09 and 85,149.90

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Solution

The fourth proportional to 156,768.48, 216,342.09 and 85,149.90 is: 117,507.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,768.48 : 216,342.09 = 85,149.90 : x
  2. Step 2: Convert to fraction form
    156,768.48/216,342.09 = 85,149.90/x
  3. Step 3: Cross multiply
    156,768.48x = 216,342.09 × 85,149.90
  4. Step 4: Simplify right side
    156,768.48x = 18,421,507,329.29
  5. Step 5: Solve for x
    x = 18,421,507,329.29/156,768.48
  6. Step 6: Final answer
    x = 117,507.72

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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.