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Finding the Fourth Proportional to 163,129.31, 225,118.08 and 90,543.32

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Solution

The fourth proportional to 163,129.31, 225,118.08 and 90,543.32 is: 124,949.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,129.31 : 225,118.08 = 90,543.32 : x
  2. Step 2: Convert to fraction form
    163,129.31/225,118.08 = 90,543.32/x
  3. Step 3: Cross multiply
    163,129.31x = 225,118.08 × 90,543.32
  4. Step 4: Simplify right side
    163,129.31x = 20,382,938,355.23
  5. Step 5: Solve for x
    x = 20,382,938,355.23/163,129.31
  6. Step 6: Final answer
    x = 124,949.58

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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.