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Finding the Fourth Proportional to 158,525.34, 218,770.40 and 86,905.42

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Solution

The fourth proportional to 158,525.34, 218,770.40 and 86,905.42 is: 119,932.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,525.34 : 218,770.40 = 86,905.42 : x
  2. Step 2: Convert to fraction form
    158,525.34/218,770.40 = 86,905.42/x
  3. Step 3: Cross multiply
    158,525.34x = 218,770.40 × 86,905.42
  4. Step 4: Simplify right side
    158,525.34x = 19,012,333,495.57
  5. Step 5: Solve for x
    x = 19,012,333,495.57/158,525.34
  6. Step 6: Final answer
    x = 119,932.46

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1.5x scale

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.