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Finding the Fourth Proportional to 55,218.80, 82,828.20 and 51,938.30

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Solution

The fourth proportional to 55,218.80, 82,828.20 and 51,938.30 is: 77,907.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,218.80 : 82,828.20 = 51,938.30 : x
  2. Step 2: Convert to fraction form
    55,218.80/82,828.20 = 51,938.30/x
  3. Step 3: Cross multiply
    55,218.80x = 82,828.20 × 51,938.30
  4. Step 4: Simplify right side
    55,218.80x = 4,301,955,900.06
  5. Step 5: Solve for x
    x = 4,301,955,900.06/55,218.80
  6. Step 6: Final answer
    x = 77,907.45

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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.