Home / 100,507.47-138,702.04-55,187.37

Finding the Fourth Proportional to 100,507.47, 138,702.04 and 55,187.37

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Solution

The fourth proportional to 100,507.47, 138,702.04 and 55,187.37 is: 76,159.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,507.47 : 138,702.04 = 55,187.37 : x
  2. Step 2: Convert to fraction form
    100,507.47/138,702.04 = 55,187.37/x
  3. Step 3: Cross multiply
    100,507.47x = 138,702.04 × 55,187.37
  4. Step 4: Simplify right side
    100,507.47x = 7,654,600,801.23
  5. Step 5: Solve for x
    x = 7,654,600,801.23/100,507.47
  6. Step 6: Final answer
    x = 76,159.52

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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.