Home / 115,291.12-159,100.32-64,990.12

Finding the Fourth Proportional to 115,291.12, 159,100.32 and 64,990.12

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Solution

The fourth proportional to 115,291.12, 159,100.32 and 64,990.12 is: 89,685.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,291.12 : 159,100.32 = 64,990.12 : x
  2. Step 2: Convert to fraction form
    115,291.12/159,100.32 = 64,990.12/x
  3. Step 3: Cross multiply
    115,291.12x = 159,100.32 × 64,990.12
  4. Step 4: Simplify right side
    115,291.12x = 10,339,948,888.84
  5. Step 5: Solve for x
    x = 10,339,948,888.84/115,291.12
  6. Step 6: Final answer
    x = 89,685.56

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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.