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Finding the Fourth Proportional to 101,990.46, 153,045.62 and 42,821.58

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Solution

The fourth proportional to 101,990.46, 153,045.62 and 42,821.58 is: 64,257.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,990.46 : 153,045.62 = 42,821.58 : x
  2. Step 2: Convert to fraction form
    101,990.46/153,045.62 = 42,821.58/x
  3. Step 3: Cross multiply
    101,990.46x = 153,045.62 × 42,821.58
  4. Step 4: Simplify right side
    101,990.46x = 6,553,655,260.48
  5. Step 5: Solve for x
    x = 6,553,655,260.48/101,990.46
  6. Step 6: Final answer
    x = 64,257.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.