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Finding the Fourth Proportional to 156,858.64, 216,460.56 and 85,236.28

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Solution

The fourth proportional to 156,858.64, 216,460.56 and 85,236.28 is: 117,623.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,858.64 : 216,460.56 = 85,236.28 : x
  2. Step 2: Convert to fraction form
    156,858.64/216,460.56 = 85,236.28/x
  3. Step 3: Cross multiply
    156,858.64x = 216,460.56 × 85,236.28
  4. Step 4: Simplify right side
    156,858.64x = 18,450,292,901.12
  5. Step 5: Solve for x
    x = 18,450,292,901.12/156,858.64
  6. Step 6: Final answer
    x = 117,623.70

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1.5x scale

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.