Home / 156,905.09-216,531.23-85,285.11

Finding the Fourth Proportional to 156,905.09, 216,531.23 and 85,285.11

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Solution

The fourth proportional to 156,905.09, 216,531.23 and 85,285.11 is: 117,694.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,905.09 : 216,531.23 = 85,285.11 : x
  2. Step 2: Convert to fraction form
    156,905.09/216,531.23 = 85,285.11/x
  3. Step 3: Cross multiply
    156,905.09x = 216,531.23 × 85,285.11
  4. Step 4: Simplify right side
    156,905.09x = 18,466,889,342.56
  5. Step 5: Solve for x
    x = 18,466,889,342.56/156,905.09
  6. Step 6: Final answer
    x = 117,694.65

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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.