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Finding the Fourth Proportional to 74,352.60, 111,528.90 and 42,859.80

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Solution

The fourth proportional to 74,352.60, 111,528.90 and 42,859.80 is: 64,289.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,352.60 : 111,528.90 = 42,859.80 : x
  2. Step 2: Convert to fraction form
    74,352.60/111,528.90 = 42,859.80/x
  3. Step 3: Cross multiply
    74,352.60x = 111,528.90 × 42,859.80
  4. Step 4: Simplify right side
    74,352.60x = 4,780,106,348.22
  5. Step 5: Solve for x
    x = 4,780,106,348.22/74,352.60
  6. Step 6: Final answer
    x = 64,289.70

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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.