Home / 99,742.62-137,639.34-56,721.36

Finding the Fourth Proportional to 99,742.62, 137,639.34 and 56,721.36

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Solution

The fourth proportional to 99,742.62, 137,639.34 and 56,721.36 is: 78,272.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,742.62 : 137,639.34 = 56,721.36 : x
  2. Step 2: Convert to fraction form
    99,742.62/137,639.34 = 56,721.36/x
  3. Step 3: Cross multiply
    99,742.62x = 137,639.34 × 56,721.36
  4. Step 4: Simplify right side
    99,742.62x = 7,807,090,554.30
  5. Step 5: Solve for x
    x = 7,807,090,554.30/99,742.62
  6. Step 6: Final answer
    x = 78,272.36

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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.