Home / 131,431.68-197,129.04-42,686.40

Finding the Fourth Proportional to 131,431.68, 197,129.04 and 42,686.40

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Solution

The fourth proportional to 131,431.68, 197,129.04 and 42,686.40 is: 64,023.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,431.68 : 197,129.04 = 42,686.40 : x
  2. Step 2: Convert to fraction form
    131,431.68/197,129.04 = 42,686.40/x
  3. Step 3: Cross multiply
    131,431.68x = 197,129.04 × 42,686.40
  4. Step 4: Simplify right side
    131,431.68x = 8,414,729,053.06
  5. Step 5: Solve for x
    x = 8,414,729,053.06/131,431.68
  6. Step 6: Final answer
    x = 64,023.60

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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.