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Finding the Fourth Proportional to 55,812.30, 83,815.65 and 39,288.30

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Solution

The fourth proportional to 55,812.30, 83,815.65 and 39,288.30 is: 59,000.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,812.30 : 83,815.65 = 39,288.30 : x
  2. Step 2: Convert to fraction form
    55,812.30/83,815.65 = 39,288.30/x
  3. Step 3: Cross multiply
    55,812.30x = 83,815.65 × 39,288.30
  4. Step 4: Simplify right side
    55,812.30x = 3,292,974,401.90
  5. Step 5: Solve for x
    x = 3,292,974,401.90/55,812.30
  6. Step 6: Final answer
    x = 59,000.87

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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.