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Finding the Fourth Proportional to 74,578.60, 111,929.10 and 73,995.40

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Solution

The fourth proportional to 74,578.60, 111,929.10 and 73,995.40 is: 111,053.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,578.60 : 111,929.10 = 73,995.40 : x
  2. Step 2: Convert to fraction form
    74,578.60/111,929.10 = 73,995.40/x
  3. Step 3: Cross multiply
    74,578.60x = 111,929.10 × 73,995.40
  4. Step 4: Simplify right side
    74,578.60x = 8,282,238,526.14
  5. Step 5: Solve for x
    x = 8,282,238,526.14/74,578.60
  6. Step 6: Final answer
    x = 111,053.82

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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.