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Finding the Fourth Proportional to 268,875.40, 403,313.10 and 81,886.60

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Solution

The fourth proportional to 268,875.40, 403,313.10 and 81,886.60 is: 122,829.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,875.40 : 403,313.10 = 81,886.60 : x
  2. Step 2: Convert to fraction form
    268,875.40/403,313.10 = 81,886.60/x
  3. Step 3: Cross multiply
    268,875.40x = 403,313.10 × 81,886.60
  4. Step 4: Simplify right side
    268,875.40x = 33,025,938,494.46
  5. Step 5: Solve for x
    x = 33,025,938,494.46/268,875.40
  6. Step 6: Final answer
    x = 122,829.90

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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.