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Finding the Fourth Proportional to 118,140.68, 163,034.17 and 64,424.31

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Solution

The fourth proportional to 118,140.68, 163,034.17 and 64,424.31 is: 88,905.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,140.68 : 163,034.17 = 64,424.31 : x
  2. Step 2: Convert to fraction form
    118,140.68/163,034.17 = 64,424.31/x
  3. Step 3: Cross multiply
    118,140.68x = 163,034.17 × 64,424.31
  4. Step 4: Simplify right side
    118,140.68x = 10,503,363,908.67
  5. Step 5: Solve for x
    x = 10,503,363,908.67/118,140.68
  6. Step 6: Final answer
    x = 88,905.57

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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.