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Finding the Fourth Proportional to 74,972.70, 112,402.86 and 45,383.40

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Solution

The fourth proportional to 74,972.70, 112,402.86 and 45,383.40 is: 68,041.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,972.70 : 112,402.86 = 45,383.40 : x
  2. Step 2: Convert to fraction form
    74,972.70/112,402.86 = 45,383.40/x
  3. Step 3: Cross multiply
    74,972.70x = 112,402.86 × 45,383.40
  4. Step 4: Simplify right side
    74,972.70x = 5,101,223,956.52
  5. Step 5: Solve for x
    x = 5,101,223,956.52/74,972.70
  6. Step 6: Final answer
    x = 68,041.09

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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.