Home / 100,135.56-138,140.40-57,669.48

Finding the Fourth Proportional to 100,135.56, 138,140.40 and 57,669.48

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Solution

The fourth proportional to 100,135.56, 138,140.40 and 57,669.48 is: 79,557.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,135.56 : 138,140.40 = 57,669.48 : x
  2. Step 2: Convert to fraction form
    100,135.56/138,140.40 = 57,669.48/x
  3. Step 3: Cross multiply
    100,135.56x = 138,140.40 × 57,669.48
  4. Step 4: Simplify right side
    100,135.56x = 7,966,485,034.99
  5. Step 5: Solve for x
    x = 7,966,485,034.99/100,135.56
  6. Step 6: Final answer
    x = 79,557.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.