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Finding the Fourth Proportional to 74,911.20, 112,366.80 and 45,313.80

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Solution

The fourth proportional to 74,911.20, 112,366.80 and 45,313.80 is: 67,970.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,911.20 : 112,366.80 = 45,313.80 : x
  2. Step 2: Convert to fraction form
    74,911.20/112,366.80 = 45,313.80/x
  3. Step 3: Cross multiply
    74,911.20x = 112,366.80 × 45,313.80
  4. Step 4: Simplify right side
    74,911.20x = 5,091,766,701.84
  5. Step 5: Solve for x
    x = 5,091,766,701.84/74,911.20
  6. Step 6: Final answer
    x = 67,970.70

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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.