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Finding the Fourth Proportional to 118,172.50, 163,078.56 and 64,458.68

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Solution

The fourth proportional to 118,172.50, 163,078.56 and 64,458.68 is: 88,953.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,172.50 : 163,078.56 = 64,458.68 : x
  2. Step 2: Convert to fraction form
    118,172.50/163,078.56 = 64,458.68/x
  3. Step 3: Cross multiply
    118,172.50x = 163,078.56 × 64,458.68
  4. Step 4: Simplify right side
    118,172.50x = 10,511,828,713.90
  5. Step 5: Solve for x
    x = 10,511,828,713.90/118,172.50
  6. Step 6: Final answer
    x = 88,953.26

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1.5x scale

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.