Home / 118,867.10-178,134.19-85,430.30

Finding the Fourth Proportional to 118,867.10, 178,134.19 and 85,430.30

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Solution

The fourth proportional to 118,867.10, 178,134.19 and 85,430.30 is: 128,025.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,867.10 : 178,134.19 = 85,430.30 : x
  2. Step 2: Convert to fraction form
    118,867.10/178,134.19 = 85,430.30/x
  3. Step 3: Cross multiply
    118,867.10x = 178,134.19 × 85,430.30
  4. Step 4: Simplify right side
    118,867.10x = 15,218,056,187.71
  5. Step 5: Solve for x
    x = 15,218,056,187.71/118,867.10
  6. Step 6: Final answer
    x = 128,025.81

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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.