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Finding the Fourth Proportional to 156,878.21, 216,495.13 and 85,262.84

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Solution

The fourth proportional to 156,878.21, 216,495.13 and 85,262.84 is: 117,664.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,878.21 : 216,495.13 = 85,262.84 : x
  2. Step 2: Convert to fraction form
    156,878.21/216,495.13 = 85,262.84/x
  3. Step 3: Cross multiply
    156,878.21x = 216,495.13 × 85,262.84
  4. Step 4: Simplify right side
    156,878.21x = 18,458,989,958.05
  5. Step 5: Solve for x
    x = 18,458,989,958.05/156,878.21
  6. Step 6: Final answer
    x = 117,664.46

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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.