Home / 100,781.65-139,075.73-55,459.62

Finding the Fourth Proportional to 100,781.65, 139,075.73 and 55,459.62

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Solution

The fourth proportional to 100,781.65, 139,075.73 and 55,459.62 is: 76,532.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,781.65 : 139,075.73 = 55,459.62 : x
  2. Step 2: Convert to fraction form
    100,781.65/139,075.73 = 55,459.62/x
  3. Step 3: Cross multiply
    100,781.65x = 139,075.73 × 55,459.62
  4. Step 4: Simplify right side
    100,781.65x = 7,713,087,137.02
  5. Step 5: Solve for x
    x = 7,713,087,137.02/100,781.65
  6. Step 6: Final answer
    x = 76,532.65

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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.