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Finding the Fourth Proportional to 103,578.20, 142,785.78 and 73,270.20

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Solution

The fourth proportional to 103,578.20, 142,785.78 and 73,270.20 is: 101,005.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,578.20 : 142,785.78 = 73,270.20 : x
  2. Step 2: Convert to fraction form
    103,578.20/142,785.78 = 73,270.20/x
  3. Step 3: Cross multiply
    103,578.20x = 142,785.78 × 73,270.20
  4. Step 4: Simplify right side
    103,578.20x = 10,461,942,657.76
  5. Step 5: Solve for x
    x = 10,461,942,657.76/103,578.20
  6. Step 6: Final answer
    x = 101,005.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.