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Finding the Fourth Proportional to 199,430.68, 299,145.20 and 81,101.02

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Solution

The fourth proportional to 199,430.68, 299,145.20 and 81,101.02 is: 121,651.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,430.68 : 299,145.20 = 81,101.02 : x
  2. Step 2: Convert to fraction form
    199,430.68/299,145.20 = 81,101.02/x
  3. Step 3: Cross multiply
    199,430.68x = 299,145.20 × 81,101.02
  4. Step 4: Simplify right side
    199,430.68x = 24,260,980,848.10
  5. Step 5: Solve for x
    x = 24,260,980,848.10/199,430.68
  6. Step 6: Final answer
    x = 121,651.20

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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.