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Finding the Fourth Proportional to 153,770.44, 212,210.58 and 86,701

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Solution

The fourth proportional to 153,770.44, 212,210.58 and 86,701 is: 119,651.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,770.44 : 212,210.58 = 86,701 : x
  2. Step 2: Convert to fraction form
    153,770.44/212,210.58 = 86,701/x
  3. Step 3: Cross multiply
    153,770.44x = 212,210.58 × 86,701
  4. Step 4: Simplify right side
    153,770.44x = 18,398,869,496.58
  5. Step 5: Solve for x
    x = 18,398,869,496.58/153,770.44
  6. Step 6: Final answer
    x = 119,651.54

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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.