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Finding the Fourth Proportional to 230,420.55, 317,979.63 and 134,908.20

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Solution

The fourth proportional to 230,420.55, 317,979.63 and 134,908.20 is: 186,172.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,420.55 : 317,979.63 = 134,908.20 : x
  2. Step 2: Convert to fraction form
    230,420.55/317,979.63 = 134,908.20/x
  3. Step 3: Cross multiply
    230,420.55x = 317,979.63 × 134,908.20
  4. Step 4: Simplify right side
    230,420.55x = 42,898,059,519.97
  5. Step 5: Solve for x
    x = 42,898,059,519.97/230,420.55
  6. Step 6: Final answer
    x = 186,172.89

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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.