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Finding the Fourth Proportional to 85,254.40, 127,881.60 and 77,881.60

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Solution

The fourth proportional to 85,254.40, 127,881.60 and 77,881.60 is: 116,822.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,254.40 : 127,881.60 = 77,881.60 : x
  2. Step 2: Convert to fraction form
    85,254.40/127,881.60 = 77,881.60/x
  3. Step 3: Cross multiply
    85,254.40x = 127,881.60 × 77,881.60
  4. Step 4: Simplify right side
    85,254.40x = 9,959,623,618.56
  5. Step 5: Solve for x
    x = 9,959,623,618.56/85,254.40
  6. Step 6: Final answer
    x = 116,822.40

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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.