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Finding the Fourth Proportional to 245,959.84, 368,978.58 and 86,080.42

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Solution

The fourth proportional to 245,959.84, 368,978.58 and 86,080.42 is: 129,134.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,959.84 : 368,978.58 = 86,080.42 : x
  2. Step 2: Convert to fraction form
    245,959.84/368,978.58 = 86,080.42/x
  3. Step 3: Cross multiply
    245,959.84x = 368,978.58 × 86,080.42
  4. Step 4: Simplify right side
    245,959.84x = 31,761,831,137.40
  5. Step 5: Solve for x
    x = 31,761,831,137.40/245,959.84
  6. Step 6: Final answer
    x = 129,134.22

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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.