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Finding the Fourth Proportional to 153,911.40, 230,867.10 and 137,322.60

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Solution

The fourth proportional to 153,911.40, 230,867.10 and 137,322.60 is: 205,983.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,911.40 : 230,867.10 = 137,322.60 : x
  2. Step 2: Convert to fraction form
    153,911.40/230,867.10 = 137,322.60/x
  3. Step 3: Cross multiply
    153,911.40x = 230,867.10 × 137,322.60
  4. Step 4: Simplify right side
    153,911.40x = 31,703,270,426.46
  5. Step 5: Solve for x
    x = 31,703,270,426.46/153,911.40
  6. Step 6: Final answer
    x = 205,983.90

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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.