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Finding the Fourth Proportional to 92,412.84, 137,950.80 and 81,202.71

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Solution

The fourth proportional to 92,412.84, 137,950.80 and 81,202.71 is: 121,216.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,412.84 : 137,950.80 = 81,202.71 : x
  2. Step 2: Convert to fraction form
    92,412.84/137,950.80 = 81,202.71/x
  3. Step 3: Cross multiply
    92,412.84x = 137,950.80 × 81,202.71
  4. Step 4: Simplify right side
    92,412.84x = 11,201,978,806.67
  5. Step 5: Solve for x
    x = 11,201,978,806.67/92,412.84
  6. Step 6: Final answer
    x = 121,216.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.