Home / 156,905.06-216,530.31-85,285.07

Finding the Fourth Proportional to 156,905.06, 216,530.31 and 85,285.07

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Solution

The fourth proportional to 156,905.06, 216,530.31 and 85,285.07 is: 117,694.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,905.06 : 216,530.31 = 85,285.07 : x
  2. Step 2: Convert to fraction form
    156,905.06/216,530.31 = 85,285.07/x
  3. Step 3: Cross multiply
    156,905.06x = 216,530.31 × 85,285.07
  4. Step 4: Simplify right side
    156,905.06x = 18,466,802,645.47
  5. Step 5: Solve for x
    x = 18,466,802,645.47/156,905.06
  6. Step 6: Final answer
    x = 117,694.12

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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.