Home / 100,985.41-139,362.82-55,663.93

Finding the Fourth Proportional to 100,985.41, 139,362.82 and 55,663.93

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Solution

The fourth proportional to 100,985.41, 139,362.82 and 55,663.93 is: 76,817.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,985.41 : 139,362.82 = 55,663.93 : x
  2. Step 2: Convert to fraction form
    100,985.41/139,362.82 = 55,663.93/x
  3. Step 3: Cross multiply
    100,985.41x = 139,362.82 × 55,663.93
  4. Step 4: Simplify right side
    100,985.41x = 7,757,482,605.81
  5. Step 5: Solve for x
    x = 7,757,482,605.81/100,985.41
  6. Step 6: Final answer
    x = 76,817.86

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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.