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Finding the Fourth Proportional to 115,328.80, 172,993.20 and 31,088.80

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Solution

The fourth proportional to 115,328.80, 172,993.20 and 31,088.80 is: 46,633.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,328.80 : 172,993.20 = 31,088.80 : x
  2. Step 2: Convert to fraction form
    115,328.80/172,993.20 = 31,088.80/x
  3. Step 3: Cross multiply
    115,328.80x = 172,993.20 × 31,088.80
  4. Step 4: Simplify right side
    115,328.80x = 5,378,150,996.16
  5. Step 5: Solve for x
    x = 5,378,150,996.16/115,328.80
  6. Step 6: Final answer
    x = 46,633.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.