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Finding the Fourth Proportional to 75,123.36, 112,433.52 and 74,128.80

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Solution

The fourth proportional to 75,123.36, 112,433.52 and 74,128.80 is: 110,945.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,123.36 : 112,433.52 = 74,128.80 : x
  2. Step 2: Convert to fraction form
    75,123.36/112,433.52 = 74,128.80/x
  3. Step 3: Cross multiply
    75,123.36x = 112,433.52 × 74,128.80
  4. Step 4: Simplify right side
    75,123.36x = 8,334,561,917.38
  5. Step 5: Solve for x
    x = 8,334,561,917.38/75,123.36
  6. Step 6: Final answer
    x = 110,945.01

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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.