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Finding the Fourth Proportional to 136,488.60, 204,848.10 and 66,427.80

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Solution

The fourth proportional to 136,488.60, 204,848.10 and 66,427.80 is: 99,697.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,488.60 : 204,848.10 = 66,427.80 : x
  2. Step 2: Convert to fraction form
    136,488.60/204,848.10 = 66,427.80/x
  3. Step 3: Cross multiply
    136,488.60x = 204,848.10 × 66,427.80
  4. Step 4: Simplify right side
    136,488.60x = 13,607,608,617.18
  5. Step 5: Solve for x
    x = 13,607,608,617.18/136,488.60
  6. Step 6: Final answer
    x = 99,697.77

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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.