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Finding the Fourth Proportional to 74,973.96, 103,456.92 and 40,980.30

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Solution

The fourth proportional to 74,973.96, 103,456.92 and 40,980.30 is: 56,548.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,973.96 : 103,456.92 = 40,980.30 : x
  2. Step 2: Convert to fraction form
    74,973.96/103,456.92 = 40,980.30/x
  3. Step 3: Cross multiply
    74,973.96x = 103,456.92 × 40,980.30
  4. Step 4: Simplify right side
    74,973.96x = 4,239,695,618.68
  5. Step 5: Solve for x
    x = 4,239,695,618.68/74,973.96
  6. Step 6: Final answer
    x = 56,548.91

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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.