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Finding the Fourth Proportional to 116,700.80, 174,905.40 and 85,499.60

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Solution

The fourth proportional to 116,700.80, 174,905.40 and 85,499.60 is: 128,142.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,700.80 : 174,905.40 = 85,499.60 : x
  2. Step 2: Convert to fraction form
    116,700.80/174,905.40 = 85,499.60/x
  3. Step 3: Cross multiply
    116,700.80x = 174,905.40 × 85,499.60
  4. Step 4: Simplify right side
    116,700.80x = 14,954,341,737.84
  5. Step 5: Solve for x
    x = 14,954,341,737.84/116,700.80
  6. Step 6: Final answer
    x = 128,142.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.