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Finding the Fourth Proportional to 76,898.67, 106,117.20 and 42,905.40

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Solution

The fourth proportional to 76,898.67, 106,117.20 and 42,905.40 is: 59,207.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,898.67 : 106,117.20 = 42,905.40 : x
  2. Step 2: Convert to fraction form
    76,898.67/106,117.20 = 42,905.40/x
  3. Step 3: Cross multiply
    76,898.67x = 106,117.20 × 42,905.40
  4. Step 4: Simplify right side
    76,898.67x = 4,553,000,912.88
  5. Step 5: Solve for x
    x = 4,553,000,912.88/76,898.67
  6. Step 6: Final answer
    x = 59,207.80

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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.