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Finding the Fourth Proportional to 74,925.84, 112,396.28 and 21,619.12

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Solution

The fourth proportional to 74,925.84, 112,396.28 and 21,619.12 is: 32,430.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,925.84 : 112,396.28 = 21,619.12 : x
  2. Step 2: Convert to fraction form
    74,925.84/112,396.28 = 21,619.12/x
  3. Step 3: Cross multiply
    74,925.84x = 112,396.28 × 21,619.12
  4. Step 4: Simplify right side
    74,925.84x = 2,429,908,664.87
  5. Step 5: Solve for x
    x = 2,429,908,664.87/74,925.84
  6. Step 6: Final answer
    x = 32,430.85

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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.