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Finding the Fourth Proportional to 73,686.80, 110,645.40 and 42,582.80

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Solution

The fourth proportional to 73,686.80, 110,645.40 and 42,582.80 is: 63,940.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,686.80 : 110,645.40 = 42,582.80 : x
  2. Step 2: Convert to fraction form
    73,686.80/110,645.40 = 42,582.80/x
  3. Step 3: Cross multiply
    73,686.80x = 110,645.40 × 42,582.80
  4. Step 4: Simplify right side
    73,686.80x = 4,711,590,939.12
  5. Step 5: Solve for x
    x = 4,711,590,939.12/73,686.80
  6. Step 6: Final answer
    x = 63,940.77

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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.