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Finding the Fourth Proportional to 76,637.58, 105,760.80 and 43,103.58

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Solution

The fourth proportional to 76,637.58, 105,760.80 and 43,103.58 is: 59,483.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,637.58 : 105,760.80 = 43,103.58 : x
  2. Step 2: Convert to fraction form
    76,637.58/105,760.80 = 43,103.58/x
  3. Step 3: Cross multiply
    76,637.58x = 105,760.80 × 43,103.58
  4. Step 4: Simplify right side
    76,637.58x = 4,558,669,103.66
  5. Step 5: Solve for x
    x = 4,558,669,103.66/76,637.58
  6. Step 6: Final answer
    x = 59,483.47

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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.