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Finding the Fourth Proportional to 235,689.84, 325,248.60 and 129,705.84

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Solution

The fourth proportional to 235,689.84, 325,248.60 and 129,705.84 is: 178,992.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,689.84 : 325,248.60 = 129,705.84 : x
  2. Step 2: Convert to fraction form
    235,689.84/325,248.60 = 129,705.84/x
  3. Step 3: Cross multiply
    235,689.84x = 325,248.60 × 129,705.84
  4. Step 4: Simplify right side
    235,689.84x = 42,186,642,871.82
  5. Step 5: Solve for x
    x = 42,186,642,871.82/235,689.84
  6. Step 6: Final answer
    x = 178,992.20

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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.