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Finding the Fourth Proportional to 230,730.30, 318,407.28 and 128,749.50

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Solution

The fourth proportional to 230,730.30, 318,407.28 and 128,749.50 is: 177,674.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,730.30 : 318,407.28 = 128,749.50 : x
  2. Step 2: Convert to fraction form
    230,730.30/318,407.28 = 128,749.50/x
  3. Step 3: Cross multiply
    230,730.30x = 318,407.28 × 128,749.50
  4. Step 4: Simplify right side
    230,730.30x = 40,994,778,096.36
  5. Step 5: Solve for x
    x = 40,994,778,096.36/230,730.30
  6. Step 6: Final answer
    x = 177,674.01

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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.