Home / 85,279.02-127,918.89-55,710.78

Finding the Fourth Proportional to 85,279.02, 127,918.89 and 55,710.78

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Solution

The fourth proportional to 85,279.02, 127,918.89 and 55,710.78 is: 83,566.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,279.02 : 127,918.89 = 55,710.78 : x
  2. Step 2: Convert to fraction form
    85,279.02/127,918.89 = 55,710.78/x
  3. Step 3: Cross multiply
    85,279.02x = 127,918.89 × 55,710.78
  4. Step 4: Simplify right side
    85,279.02x = 7,126,461,138.63
  5. Step 5: Solve for x
    x = 7,126,461,138.63/85,279.02
  6. Step 6: Final answer
    x = 83,566.41

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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.