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Finding the Fourth Proportional to 76,899.67, 106,118.58 and 42,906.40

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Solution

The fourth proportional to 76,899.67, 106,118.58 and 42,906.40 is: 59,209.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,899.67 : 106,118.58 = 42,906.40 : x
  2. Step 2: Convert to fraction form
    76,899.67/106,118.58 = 42,906.40/x
  3. Step 3: Cross multiply
    76,899.67x = 106,118.58 × 42,906.40
  4. Step 4: Simplify right side
    76,899.67x = 4,553,166,240.91
  5. Step 5: Solve for x
    x = 4,553,166,240.91/76,899.67
  6. Step 6: Final answer
    x = 59,209.18

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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.