Home / 76,811.19-105,999.20-42,819.30

Finding the Fourth Proportional to 76,811.19, 105,999.20 and 42,819.30

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Solution

The fourth proportional to 76,811.19, 105,999.20 and 42,819.30 is: 59,090.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,811.19 : 105,999.20 = 42,819.30 : x
  2. Step 2: Convert to fraction form
    76,811.19/105,999.20 = 42,819.30/x
  3. Step 3: Cross multiply
    76,811.19x = 105,999.20 × 42,819.30
  4. Step 4: Simplify right side
    76,811.19x = 4,538,811,330.46
  5. Step 5: Solve for x
    x = 4,538,811,330.46/76,811.19
  6. Step 6: Final answer
    x = 59,090.50

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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.