Home / 100,071.72-138,133.68-57,647.16

Finding the Fourth Proportional to 100,071.72, 138,133.68 and 57,647.16

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Solution

The fourth proportional to 100,071.72, 138,133.68 and 57,647.16 is: 79,573.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,071.72 : 138,133.68 = 57,647.16 : x
  2. Step 2: Convert to fraction form
    100,071.72/138,133.68 = 57,647.16/x
  3. Step 3: Cross multiply
    100,071.72x = 138,133.68 × 57,647.16
  4. Step 4: Simplify right side
    100,071.72x = 7,963,014,352.35
  5. Step 5: Solve for x
    x = 7,963,014,352.35/100,071.72
  6. Step 6: Final answer
    x = 79,573.07

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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.