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Finding the Fourth Proportional to 73,309.20, 109,963.80 and 42,205.20

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Solution

The fourth proportional to 73,309.20, 109,963.80 and 42,205.20 is: 63,307.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,309.20 : 109,963.80 = 42,205.20 : x
  2. Step 2: Convert to fraction form
    73,309.20/109,963.80 = 42,205.20/x
  3. Step 3: Cross multiply
    73,309.20x = 109,963.80 × 42,205.20
  4. Step 4: Simplify right side
    73,309.20x = 4,641,044,171.76
  5. Step 5: Solve for x
    x = 4,641,044,171.76/73,309.20
  6. Step 6: Final answer
    x = 63,307.80

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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.