Home / 97,418.70-145,836.45-86,921.10

Finding the Fourth Proportional to 97,418.70, 145,836.45 and 86,921.10

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Solution

The fourth proportional to 97,418.70, 145,836.45 and 86,921.10 is: 130,121.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,418.70 : 145,836.45 = 86,921.10 : x
  2. Step 2: Convert to fraction form
    97,418.70/145,836.45 = 86,921.10/x
  3. Step 3: Cross multiply
    97,418.70x = 145,836.45 × 86,921.10
  4. Step 4: Simplify right side
    97,418.70x = 12,676,264,654.10
  5. Step 5: Solve for x
    x = 12,676,264,654.10/97,418.70
  6. Step 6: Final answer
    x = 130,121.47

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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.