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Finding the Fourth Proportional to 55,798.72, 83,688.88 and 18,359.28

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Solution

The fourth proportional to 55,798.72, 83,688.88 and 18,359.28 is: 27,535.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,798.72 : 83,688.88 = 18,359.28 : x
  2. Step 2: Convert to fraction form
    55,798.72/83,688.88 = 18,359.28/x
  3. Step 3: Cross multiply
    55,798.72x = 83,688.88 × 18,359.28
  4. Step 4: Simplify right side
    55,798.72x = 1,536,467,580.81
  5. Step 5: Solve for x
    x = 1,536,467,580.81/55,798.72
  6. Step 6: Final answer
    x = 27,535.89

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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.