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Finding the Fourth Proportional to 76,652.70, 105,780.57 and 43,118.70

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Solution

The fourth proportional to 76,652.70, 105,780.57 and 43,118.70 is: 59,503.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,652.70 : 105,780.57 = 43,118.70 : x
  2. Step 2: Convert to fraction form
    76,652.70/105,780.57 = 43,118.70/x
  3. Step 3: Cross multiply
    76,652.70x = 105,780.57 × 43,118.70
  4. Step 4: Simplify right side
    76,652.70x = 4,561,120,663.66
  5. Step 5: Solve for x
    x = 4,561,120,663.66/76,652.70
  6. Step 6: Final answer
    x = 59,503.72

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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.