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Finding the Fourth Proportional to 126,712.60, 174,662.40 and 99,812.50

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Solution

The fourth proportional to 126,712.60, 174,662.40 and 99,812.50 is: 137,582.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,712.60 : 174,662.40 = 99,812.50 : x
  2. Step 2: Convert to fraction form
    126,712.60/174,662.40 = 99,812.50/x
  3. Step 3: Cross multiply
    126,712.60x = 174,662.40 × 99,812.50
  4. Step 4: Simplify right side
    126,712.60x = 17,433,490,800
  5. Step 5: Solve for x
    x = 17,433,490,800/126,712.60
  6. Step 6: Final answer
    x = 137,582.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.