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Finding the Fourth Proportional to 118,137.68, 163,030.03 and 64,421.31

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Solution

The fourth proportional to 118,137.68, 163,030.03 and 64,421.31 is: 88,901.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,137.68 : 163,030.03 = 64,421.31 : x
  2. Step 2: Convert to fraction form
    118,137.68/163,030.03 = 64,421.31/x
  3. Step 3: Cross multiply
    118,137.68x = 163,030.03 × 64,421.31
  4. Step 4: Simplify right side
    118,137.68x = 10,502,608,914.62
  5. Step 5: Solve for x
    x = 10,502,608,914.62/118,137.68
  6. Step 6: Final answer
    x = 88,901.43

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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.