Home / 76,809.85-105,989.03-42,815.77

Finding the Fourth Proportional to 76,809.85, 105,989.03 and 42,815.77

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Solution

The fourth proportional to 76,809.85, 105,989.03 and 42,815.77 is: 59,080.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,809.85 : 105,989.03 = 42,815.77 : x
  2. Step 2: Convert to fraction form
    76,809.85/105,989.03 = 42,815.77/x
  3. Step 3: Cross multiply
    76,809.85x = 105,989.03 × 42,815.77
  4. Step 4: Simplify right side
    76,809.85x = 4,538,001,931.00
  5. Step 5: Solve for x
    x = 4,538,001,931.00/76,809.85
  6. Step 6: Final answer
    x = 59,080.99

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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.