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Finding the Fourth Proportional to 118,828.08, 163,978.56 and 71,053.20

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Solution

The fourth proportional to 118,828.08, 163,978.56 and 71,053.20 is: 98,050.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,828.08 : 163,978.56 = 71,053.20 : x
  2. Step 2: Convert to fraction form
    118,828.08/163,978.56 = 71,053.20/x
  3. Step 3: Cross multiply
    118,828.08x = 163,978.56 × 71,053.20
  4. Step 4: Simplify right side
    118,828.08x = 11,651,201,419.39
  5. Step 5: Solve for x
    x = 11,651,201,419.39/118,828.08
  6. Step 6: Final answer
    x = 98,050.91

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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.