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Finding the Fourth Proportional to 81,607.80, 112,653.65 and 76,500.83

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Solution

The fourth proportional to 81,607.80, 112,653.65 and 76,500.83 is: 105,603.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,607.80 : 112,653.65 = 76,500.83 : x
  2. Step 2: Convert to fraction form
    81,607.80/112,653.65 = 76,500.83/x
  3. Step 3: Cross multiply
    81,607.80x = 112,653.65 × 76,500.83
  4. Step 4: Simplify right side
    81,607.80x = 8,618,096,781.76
  5. Step 5: Solve for x
    x = 8,618,096,781.76/81,607.80
  6. Step 6: Final answer
    x = 105,603.84

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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.