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Finding the Fourth Proportional to 68,237.40, 102,331.80 and 30,815.40

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Solution

The fourth proportional to 68,237.40, 102,331.80 and 30,815.40 is: 46,212.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,237.40 : 102,331.80 = 30,815.40 : x
  2. Step 2: Convert to fraction form
    68,237.40/102,331.80 = 30,815.40/x
  3. Step 3: Cross multiply
    68,237.40x = 102,331.80 × 30,815.40
  4. Step 4: Simplify right side
    68,237.40x = 3,153,395,349.72
  5. Step 5: Solve for x
    x = 3,153,395,349.72/68,237.40
  6. Step 6: Final answer
    x = 46,212.13

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1.5x scale

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.