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Finding the Fourth Proportional to 55,125.78, 82,688.67 and 13,572.78

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Solution

The fourth proportional to 55,125.78, 82,688.67 and 13,572.78 is: 20,359.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,125.78 : 82,688.67 = 13,572.78 : x
  2. Step 2: Convert to fraction form
    55,125.78/82,688.67 = 13,572.78/x
  3. Step 3: Cross multiply
    55,125.78x = 82,688.67 × 13,572.78
  4. Step 4: Simplify right side
    55,125.78x = 1,122,315,126.40
  5. Step 5: Solve for x
    x = 1,122,315,126.40/55,125.78
  6. Step 6: Final answer
    x = 20,359.17

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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.