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Finding the Fourth Proportional to 74,240.80, 111,430.80 and 39,205.60

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Solution

The fourth proportional to 74,240.80, 111,430.80 and 39,205.60 is: 58,845.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,240.80 : 111,430.80 = 39,205.60 : x
  2. Step 2: Convert to fraction form
    74,240.80/111,430.80 = 39,205.60/x
  3. Step 3: Cross multiply
    74,240.80x = 111,430.80 × 39,205.60
  4. Step 4: Simplify right side
    74,240.80x = 4,368,711,372.48
  5. Step 5: Solve for x
    x = 4,368,711,372.48/74,240.80
  6. Step 6: Final answer
    x = 58,845.15

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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.