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Finding the Fourth Proportional to 103,070.70, 154,606.05 and 87,324.30

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Solution

The fourth proportional to 103,070.70, 154,606.05 and 87,324.30 is: 130,986.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,070.70 : 154,606.05 = 87,324.30 : x
  2. Step 2: Convert to fraction form
    103,070.70/154,606.05 = 87,324.30/x
  3. Step 3: Cross multiply
    103,070.70x = 154,606.05 × 87,324.30
  4. Step 4: Simplify right side
    103,070.70x = 13,500,865,092.02
  5. Step 5: Solve for x
    x = 13,500,865,092.02/103,070.70
  6. Step 6: Final answer
    x = 130,986.45

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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.