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Finding the Fourth Proportional to 116,490.60, 160,360.32 and 86,218.86

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Solution

The fourth proportional to 116,490.60, 160,360.32 and 86,218.86 is: 118,688.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,490.60 : 160,360.32 = 86,218.86 : x
  2. Step 2: Convert to fraction form
    116,490.60/160,360.32 = 86,218.86/x
  3. Step 3: Cross multiply
    116,490.60x = 160,360.32 × 86,218.86
  4. Step 4: Simplify right side
    116,490.60x = 13,826,083,979.64
  5. Step 5: Solve for x
    x = 13,826,083,979.64/116,490.60
  6. Step 6: Final answer
    x = 118,688.41

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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.