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Finding the Fourth Proportional to 105,759.45, 145,897.74 and 63,309.78

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Solution

The fourth proportional to 105,759.45, 145,897.74 and 63,309.78 is: 87,337.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,759.45 : 145,897.74 = 63,309.78 : x
  2. Step 2: Convert to fraction form
    105,759.45/145,897.74 = 63,309.78/x
  3. Step 3: Cross multiply
    105,759.45x = 145,897.74 × 63,309.78
  4. Step 4: Simplify right side
    105,759.45x = 9,236,753,821.90
  5. Step 5: Solve for x
    x = 9,236,753,821.90/105,759.45
  6. Step 6: Final answer
    x = 87,337.39

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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.