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Finding the Fourth Proportional to 103,428.70, 155,288.85 and 64,062.70

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Solution

The fourth proportional to 103,428.70, 155,288.85 and 64,062.70 is: 96,184.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,428.70 : 155,288.85 = 64,062.70 : x
  2. Step 2: Convert to fraction form
    103,428.70/155,288.85 = 64,062.70/x
  3. Step 3: Cross multiply
    103,428.70x = 155,288.85 × 64,062.70
  4. Step 4: Simplify right side
    103,428.70x = 9,948,223,010.90
  5. Step 5: Solve for x
    x = 9,948,223,010.90/103,428.70
  6. Step 6: Final answer
    x = 96,184.36

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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.