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Finding the Fourth Proportional to 163,712.80, 245,338.80 and 121,261.60

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Solution

The fourth proportional to 163,712.80, 245,338.80 and 121,261.60 is: 181,721.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,712.80 : 245,338.80 = 121,261.60 : x
  2. Step 2: Convert to fraction form
    163,712.80/245,338.80 = 121,261.60/x
  3. Step 3: Cross multiply
    163,712.80x = 245,338.80 × 121,261.60
  4. Step 4: Simplify right side
    163,712.80x = 29,750,175,430.08
  5. Step 5: Solve for x
    x = 29,750,175,430.08/163,712.80
  6. Step 6: Final answer
    x = 181,721.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.