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Finding the Fourth Proportional to 115,920.51, 159,976.26 and 64,930.20

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Solution

The fourth proportional to 115,920.51, 159,976.26 and 64,930.20 is: 89,607.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,920.51 : 159,976.26 = 64,930.20 : x
  2. Step 2: Convert to fraction form
    115,920.51/159,976.26 = 64,930.20/x
  3. Step 3: Cross multiply
    115,920.51x = 159,976.26 × 64,930.20
  4. Step 4: Simplify right side
    115,920.51x = 10,387,290,557.05
  5. Step 5: Solve for x
    x = 10,387,290,557.05/115,920.51
  6. Step 6: Final answer
    x = 89,607.01

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1.5x scale

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.