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Finding the Fourth Proportional to 74,420.60, 111,630.90 and 42,927.80

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Solution

The fourth proportional to 74,420.60, 111,630.90 and 42,927.80 is: 64,391.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,420.60 : 111,630.90 = 42,927.80 : x
  2. Step 2: Convert to fraction form
    74,420.60/111,630.90 = 42,927.80/x
  3. Step 3: Cross multiply
    74,420.60x = 111,630.90 × 42,927.80
  4. Step 4: Simplify right side
    74,420.60x = 4,792,068,949.02
  5. Step 5: Solve for x
    x = 4,792,068,949.02/74,420.60
  6. Step 6: Final answer
    x = 64,391.70

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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.