Home / 105,484.80-145,563.39-57,728.91

Finding the Fourth Proportional to 105,484.80, 145,563.39 and 57,728.91

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Solution

The fourth proportional to 105,484.80, 145,563.39 and 57,728.91 is: 79,662.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,484.80 : 145,563.39 = 57,728.91 : x
  2. Step 2: Convert to fraction form
    105,484.80/145,563.39 = 57,728.91/x
  3. Step 3: Cross multiply
    105,484.80x = 145,563.39 × 57,728.91
  4. Step 4: Simplify right side
    105,484.80x = 8,403,215,840.60
  5. Step 5: Solve for x
    x = 8,403,215,840.60/105,484.80
  6. Step 6: Final answer
    x = 79,662.81

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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.