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Finding the Fourth Proportional to 66,639.51, 99,973.22 and 19,254.51

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Solution

The fourth proportional to 66,639.51, 99,973.22 and 19,254.51 is: 28,885.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,639.51 : 99,973.22 = 19,254.51 : x
  2. Step 2: Convert to fraction form
    66,639.51/99,973.22 = 19,254.51/x
  3. Step 3: Cross multiply
    66,639.51x = 99,973.22 × 19,254.51
  4. Step 4: Simplify right side
    66,639.51x = 1,924,935,267.95
  5. Step 5: Solve for x
    x = 1,924,935,267.95/66,639.51
  6. Step 6: Final answer
    x = 28,885.80

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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.