Home / 156,971.64-216,619.29-85,351.68

Finding the Fourth Proportional to 156,971.64, 216,619.29 and 85,351.68

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Solution

The fourth proportional to 156,971.64, 216,619.29 and 85,351.68 is: 117,784.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,971.64 : 216,619.29 = 85,351.68 : x
  2. Step 2: Convert to fraction form
    156,971.64/216,619.29 = 85,351.68/x
  3. Step 3: Cross multiply
    156,971.64x = 216,619.29 × 85,351.68
  4. Step 4: Simplify right side
    156,971.64x = 18,488,820,321.91
  5. Step 5: Solve for x
    x = 18,488,820,321.91/156,971.64
  6. Step 6: Final answer
    x = 117,784.46

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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.