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Finding the Fourth Proportional to 147,808.26, 203,990.40 and 87,398.46

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Solution

The fourth proportional to 147,808.26, 203,990.40 and 87,398.46 is: 120,618.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,808.26 : 203,990.40 = 87,398.46 : x
  2. Step 2: Convert to fraction form
    147,808.26/203,990.40 = 87,398.46/x
  3. Step 3: Cross multiply
    147,808.26x = 203,990.40 × 87,398.46
  4. Step 4: Simplify right side
    147,808.26x = 17,828,446,814.78
  5. Step 5: Solve for x
    x = 17,828,446,814.78/147,808.26
  6. Step 6: Final answer
    x = 120,618.74

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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.