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Finding the Fourth Proportional to 103,651.90, 155,362.65 and 56,938.30

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Solution

The fourth proportional to 103,651.90, 155,362.65 and 56,938.30 is: 85,344.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,651.90 : 155,362.65 = 56,938.30 : x
  2. Step 2: Convert to fraction form
    103,651.90/155,362.65 = 56,938.30/x
  3. Step 3: Cross multiply
    103,651.90x = 155,362.65 × 56,938.30
  4. Step 4: Simplify right side
    103,651.90x = 8,846,085,174.50
  5. Step 5: Solve for x
    x = 8,846,085,174.50/103,651.90
  6. Step 6: Final answer
    x = 85,344.17

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1.5x scale

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.