Home / 115,721.21-159,681.62-64,736.57

Finding the Fourth Proportional to 115,721.21, 159,681.62 and 64,736.57

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Solution

The fourth proportional to 115,721.21, 159,681.62 and 64,736.57 is: 89,328.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,721.21 : 159,681.62 = 64,736.57 : x
  2. Step 2: Convert to fraction form
    115,721.21/159,681.62 = 64,736.57/x
  3. Step 3: Cross multiply
    115,721.21x = 159,681.62 × 64,736.57
  4. Step 4: Simplify right side
    115,721.21x = 10,337,239,248.75
  5. Step 5: Solve for x
    x = 10,337,239,248.75/115,721.21
  6. Step 6: Final answer
    x = 89,328.82

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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.