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Finding the Fourth Proportional to 47,190.60, 70,785.90 and 28,528.20

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Solution

The fourth proportional to 47,190.60, 70,785.90 and 28,528.20 is: 42,792.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,190.60 : 70,785.90 = 28,528.20 : x
  2. Step 2: Convert to fraction form
    47,190.60/70,785.90 = 28,528.20/x
  3. Step 3: Cross multiply
    47,190.60x = 70,785.90 × 28,528.20
  4. Step 4: Simplify right side
    47,190.60x = 2,019,394,312.38
  5. Step 5: Solve for x
    x = 2,019,394,312.38/47,190.60
  6. Step 6: Final answer
    x = 42,792.30

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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.