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Finding the Fourth Proportional to 156,636, 216,170.64 and 89,580.96

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Solution

The fourth proportional to 156,636, 216,170.64 and 89,580.96 is: 123,629.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,636 : 216,170.64 = 89,580.96 : x
  2. Step 2: Convert to fraction form
    156,636/216,170.64 = 89,580.96/x
  3. Step 3: Cross multiply
    156,636x = 216,170.64 × 89,580.96
  4. Step 4: Simplify right side
    156,636x = 19,364,773,455.01
  5. Step 5: Solve for x
    x = 19,364,773,455.01/156,636
  6. Step 6: Final answer
    x = 123,629.14

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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.