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Finding the Fourth Proportional to 99,164, 136,853.64 and 61,445.60

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Solution

The fourth proportional to 99,164, 136,853.64 and 61,445.60 is: 84,799.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,164 : 136,853.64 = 61,445.60 : x
  2. Step 2: Convert to fraction form
    99,164/136,853.64 = 61,445.60/x
  3. Step 3: Cross multiply
    99,164x = 136,853.64 × 61,445.60
  4. Step 4: Simplify right side
    99,164x = 8,409,054,021.98
  5. Step 5: Solve for x
    x = 8,409,054,021.98/99,164
  6. Step 6: Final answer
    x = 84,799.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.