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Finding the Fourth Proportional to 76,642.80, 105,770.52 and 43,108.80

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Solution

The fourth proportional to 76,642.80, 105,770.52 and 43,108.80 is: 59,492.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,642.80 : 105,770.52 = 43,108.80 : x
  2. Step 2: Convert to fraction form
    76,642.80/105,770.52 = 43,108.80/x
  3. Step 3: Cross multiply
    76,642.80x = 105,770.52 × 43,108.80
  4. Step 4: Simplify right side
    76,642.80x = 4,559,640,192.58
  5. Step 5: Solve for x
    x = 4,559,640,192.58/76,642.80
  6. Step 6: Final answer
    x = 59,492.09

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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.