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Finding the Fourth Proportional to 49,689.20, 74,404.20 and 47,356.40

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Solution

The fourth proportional to 49,689.20, 74,404.20 and 47,356.40 is: 70,911.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,689.20 : 74,404.20 = 47,356.40 : x
  2. Step 2: Convert to fraction form
    49,689.20/74,404.20 = 47,356.40/x
  3. Step 3: Cross multiply
    49,689.20x = 74,404.20 × 47,356.40
  4. Step 4: Simplify right side
    49,689.20x = 3,523,515,056.88
  5. Step 5: Solve for x
    x = 3,523,515,056.88/49,689.20
  6. Step 6: Final answer
    x = 70,911.08

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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.