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Finding the Fourth Proportional to 101,988.45, 153,042.62 and 42,819.57

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Solution

The fourth proportional to 101,988.45, 153,042.62 and 42,819.57 is: 64,254.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,988.45 : 153,042.62 = 42,819.57 : x
  2. Step 2: Convert to fraction form
    101,988.45/153,042.62 = 42,819.57/x
  3. Step 3: Cross multiply
    101,988.45x = 153,042.62 × 42,819.57
  4. Step 4: Simplify right side
    101,988.45x = 6,553,218,965.98
  5. Step 5: Solve for x
    x = 6,553,218,965.98/101,988.45
  6. Step 6: Final answer
    x = 64,254.52

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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.