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Finding the Fourth Proportional to 99,920.36, 137,824.80 and 64,053.56

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Solution

The fourth proportional to 99,920.36, 137,824.80 and 64,053.56 is: 88,352.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,920.36 : 137,824.80 = 64,053.56 : x
  2. Step 2: Convert to fraction form
    99,920.36/137,824.80 = 64,053.56/x
  3. Step 3: Cross multiply
    99,920.36x = 137,824.80 × 64,053.56
  4. Step 4: Simplify right side
    99,920.36x = 8,828,169,096.29
  5. Step 5: Solve for x
    x = 8,828,169,096.29/99,920.36
  6. Step 6: Final answer
    x = 88,352.05

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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.