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Finding the Fourth Proportional to 170,705.64, 235,602.54 and 99,145.56

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Solution

The fourth proportional to 170,705.64, 235,602.54 and 99,145.56 is: 136,837.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,705.64 : 235,602.54 = 99,145.56 : x
  2. Step 2: Convert to fraction form
    170,705.64/235,602.54 = 99,145.56/x
  3. Step 3: Cross multiply
    170,705.64x = 235,602.54 × 99,145.56
  4. Step 4: Simplify right side
    170,705.64x = 23,358,945,765.72
  5. Step 5: Solve for x
    x = 23,358,945,765.72/170,705.64
  6. Step 6: Final answer
    x = 136,837.57

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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.