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Finding the Fourth Proportional to 74,424.75, 102,707.78 and 40,890.75

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Solution

The fourth proportional to 74,424.75, 102,707.78 and 40,890.75 is: 56,430.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,424.75 : 102,707.78 = 40,890.75 : x
  2. Step 2: Convert to fraction form
    74,424.75/102,707.78 = 40,890.75/x
  3. Step 3: Cross multiply
    74,424.75x = 102,707.78 × 40,890.75
  4. Step 4: Simplify right side
    74,424.75x = 4,199,797,950.58
  5. Step 5: Solve for x
    x = 4,199,797,950.58/74,424.75
  6. Step 6: Final answer
    x = 56,430.13

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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.