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Finding the Fourth Proportional to 115,008, 158,707.84 and 64,021.12

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Solution

The fourth proportional to 115,008, 158,707.84 and 64,021.12 is: 88,347.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,008 : 158,707.84 = 64,021.12 : x
  2. Step 2: Convert to fraction form
    115,008/158,707.84 = 64,021.12/x
  3. Step 3: Cross multiply
    115,008x = 158,707.84 × 64,021.12
  4. Step 4: Simplify right side
    115,008x = 10,160,653,669.58
  5. Step 5: Solve for x
    x = 10,160,653,669.58/115,008
  6. Step 6: Final answer
    x = 88,347.36

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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.