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Finding the Fourth Proportional to 171,979.60, 257,459.10 and 127,802.20

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Solution

The fourth proportional to 171,979.60, 257,459.10 and 127,802.20 is: 191,324.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,979.60 : 257,459.10 = 127,802.20 : x
  2. Step 2: Convert to fraction form
    171,979.60/257,459.10 = 127,802.20/x
  3. Step 3: Cross multiply
    171,979.60x = 257,459.10 × 127,802.20
  4. Step 4: Simplify right side
    171,979.60x = 32,903,839,390.02
  5. Step 5: Solve for x
    x = 32,903,839,390.02/171,979.60
  6. Step 6: Final answer
    x = 191,324.08

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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.