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Finding the Fourth Proportional to 72,443.40, 108,665.10 and 51,448.20

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Solution

The fourth proportional to 72,443.40, 108,665.10 and 51,448.20 is: 77,172.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,443.40 : 108,665.10 = 51,448.20 : x
  2. Step 2: Convert to fraction form
    72,443.40/108,665.10 = 51,448.20/x
  3. Step 3: Cross multiply
    72,443.40x = 108,665.10 × 51,448.20
  4. Step 4: Simplify right side
    72,443.40x = 5,590,623,797.82
  5. Step 5: Solve for x
    x = 5,590,623,797.82/72,443.40
  6. Step 6: Final answer
    x = 77,172.30

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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.