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Finding the Fourth Proportional to 118,389.20, 163,379.51 and 64,677.69

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Solution

The fourth proportional to 118,389.20, 163,379.51 and 64,677.69 is: 89,256.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,389.20 : 163,379.51 = 64,677.69 : x
  2. Step 2: Convert to fraction form
    118,389.20/163,379.51 = 64,677.69/x
  3. Step 3: Cross multiply
    118,389.20x = 163,379.51 × 64,677.69
  4. Step 4: Simplify right side
    118,389.20x = 10,567,009,037.38
  5. Step 5: Solve for x
    x = 10,567,009,037.38/118,389.20
  6. Step 6: Final answer
    x = 89,256.53

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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.