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Finding the Fourth Proportional to 115,728.80, 173,602.80 and 36,840.80

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Solution

The fourth proportional to 115,728.80, 173,602.80 and 36,840.80 is: 55,264.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,728.80 : 173,602.80 = 36,840.80 : x
  2. Step 2: Convert to fraction form
    115,728.80/173,602.80 = 36,840.80/x
  3. Step 3: Cross multiply
    115,728.80x = 173,602.80 × 36,840.80
  4. Step 4: Simplify right side
    115,728.80x = 6,395,666,034.24
  5. Step 5: Solve for x
    x = 6,395,666,034.24/115,728.80
  6. Step 6: Final answer
    x = 55,264.26

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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.