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Finding the Fourth Proportional to 105,117.40, 157,676.10 and 31,245.40

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Solution

The fourth proportional to 105,117.40, 157,676.10 and 31,245.40 is: 46,868.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,117.40 : 157,676.10 = 31,245.40 : x
  2. Step 2: Convert to fraction form
    105,117.40/157,676.10 = 31,245.40/x
  3. Step 3: Cross multiply
    105,117.40x = 157,676.10 × 31,245.40
  4. Step 4: Simplify right side
    105,117.40x = 4,926,652,814.94
  5. Step 5: Solve for x
    x = 4,926,652,814.94/105,117.40
  6. Step 6: Final answer
    x = 46,868.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.