Home / 76,905.12-106,148.40-43,390.56

Finding the Fourth Proportional to 76,905.12, 106,148.40 and 43,390.56

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Solution

The fourth proportional to 76,905.12, 106,148.40 and 43,390.56 is: 59,889.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,905.12 : 106,148.40 = 43,390.56 : x
  2. Step 2: Convert to fraction form
    76,905.12/106,148.40 = 43,390.56/x
  3. Step 3: Cross multiply
    76,905.12x = 106,148.40 × 43,390.56
  4. Step 4: Simplify right side
    76,905.12x = 4,605,838,519.10
  5. Step 5: Solve for x
    x = 4,605,838,519.10/76,905.12
  6. Step 6: Final answer
    x = 59,889.88

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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.