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Finding the Fourth Proportional to 230,373.11, 317,903.69 and 128,409.71

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Solution

The fourth proportional to 230,373.11, 317,903.69 and 128,409.71 is: 177,199.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,373.11 : 317,903.69 = 128,409.71 : x
  2. Step 2: Convert to fraction form
    230,373.11/317,903.69 = 128,409.71/x
  3. Step 3: Cross multiply
    230,373.11x = 317,903.69 × 128,409.71
  4. Step 4: Simplify right side
    230,373.11x = 40,821,918,650.03
  5. Step 5: Solve for x
    x = 40,821,918,650.03/230,373.11
  6. Step 6: Final answer
    x = 177,199.15

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1.5x scale

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.