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Finding the Fourth Proportional to 84,929.40, 127,539.90 and 55,477.80

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Solution

The fourth proportional to 84,929.40, 127,539.90 and 55,477.80 is: 83,311.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,929.40 : 127,539.90 = 55,477.80 : x
  2. Step 2: Convert to fraction form
    84,929.40/127,539.90 = 55,477.80/x
  3. Step 3: Cross multiply
    84,929.40x = 127,539.90 × 55,477.80
  4. Step 4: Simplify right side
    84,929.40x = 7,075,633,064.22
  5. Step 5: Solve for x
    x = 7,075,633,064.22/84,929.40
  6. Step 6: Final answer
    x = 83,311.94

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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.