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Finding the Fourth Proportional to 47,345.40, 70,931.70 and 28,855.80

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Solution

The fourth proportional to 47,345.40, 70,931.70 and 28,855.80 is: 43,231.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,345.40 : 70,931.70 = 28,855.80 : x
  2. Step 2: Convert to fraction form
    47,345.40/70,931.70 = 28,855.80/x
  3. Step 3: Cross multiply
    47,345.40x = 70,931.70 × 28,855.80
  4. Step 4: Simplify right side
    47,345.40x = 2,046,790,948.86
  5. Step 5: Solve for x
    x = 2,046,790,948.86/47,345.40
  6. Step 6: Final answer
    x = 43,231.04

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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.