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Finding the Fourth Proportional to 74,053.80, 111,031.47 and 40,789.50

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Solution

The fourth proportional to 74,053.80, 111,031.47 and 40,789.50 is: 61,157.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,053.80 : 111,031.47 = 40,789.50 : x
  2. Step 2: Convert to fraction form
    74,053.80/111,031.47 = 40,789.50/x
  3. Step 3: Cross multiply
    74,053.80x = 111,031.47 × 40,789.50
  4. Step 4: Simplify right side
    74,053.80x = 4,528,918,145.57
  5. Step 5: Solve for x
    x = 4,528,918,145.57/74,053.80
  6. Step 6: Final answer
    x = 61,157.13

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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.