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Finding the Fourth Proportional to 61,404.80, 92,107.20 and 42,742.40

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Solution

The fourth proportional to 61,404.80, 92,107.20 and 42,742.40 is: 64,113.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,404.80 : 92,107.20 = 42,742.40 : x
  2. Step 2: Convert to fraction form
    61,404.80/92,107.20 = 42,742.40/x
  3. Step 3: Cross multiply
    61,404.80x = 92,107.20 × 42,742.40
  4. Step 4: Simplify right side
    61,404.80x = 3,936,882,785.28
  5. Step 5: Solve for x
    x = 3,936,882,785.28/61,404.80
  6. Step 6: Final answer
    x = 64,113.60

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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.